All SEO Tools
502 free tools for SEO, YouTube, domains, content and developers.
What tools does URLMode offer?
URLMode offers 502 free online tools in 11 categories — URL & link, website SEO, domain & authority, YouTube, image, PDF, audio & video, CSS & design, calculators, content & text, and developer utilities — plus a URL shortener and dynamic QR code generator.
Free URL Shortener
Shorten long links into clean fvj.io short URLs with click tracking — free, fast and safe.
Popular
QR Code Generator
Create a free dynamic QR code for any link — track scans and change the destination any time.
Popular
Redirect Checker
Trace every hop of a redirect chain with status codes and timing.
URL Slug Generator
Turn any title into a clean, SEO-friendly URL slug — lowercase, hyphenated and stop-word free.
URL Encoder / Decoder
Percent-encode or decode URLs and query strings.
HTTP Status Code Checker
Check the HTTP status code of up to 20 URLs at once.
HTTP Headers Checker
See every HTTP response header plus a security-header grade.
Open Graph Checker
Preview how your page looks when shared on Facebook, LinkedIn, X and WhatsApp.
Canonical URL Checker
Check a page's rel=canonical tag, HTTP Link header and whether the canonical is self-referencing.
Bulk UTM Builder & Campaign Tag Generator
Add the same UTM campaign tags to a whole list of URLs in one go.
UTM Campaign URL Builder
Build trackable campaign URLs for Google Analytics.
URL Query Parameter Remover
Strip UTM tags, click IDs or any query parameter from one or many URLs at once.
Bulk URL Cleaner (Trailing Slash, Case & Duplicates)
Bulk add or remove trailing slashes, force HTTPS, strip www, lowercase and de-duplicate URL lists.
URL Expander (Unshorten Links)
See where a short link really goes before you click — reveals every hop and the final destination.
Broken Link Checker
Scan a page for broken links (404, 410, 5xx) and redirect chains — up to 100 links per scan.
Website Link Extractor
Extract all internal and external links from any web page, with anchor text and rel attributes.
URL Extractor (Extract Links from Text)
Pull every URL out of any block of text, HTML or email — de-duplicated and ready to copy.
URL Parser & Query String Splitter
Break any URL into protocol, host, port, path, query parameters and fragment.
Punycode / IDN Converter
Convert internationalised domain names (IDN) to Punycode (xn--) and back.
Htaccess Redirect Generator
Generate .htaccess rules for www, HTTPS and 301 page redirects.
URL Rewriting Tool
Turn dynamic URLs into SEO-friendly static URLs with the matching rewrite rule.
Bulk URL Opener
Open many URLs in new tabs with one click.
WhatsApp Link Generator
Create a wa.me click-to-chat link with a pre-filled message for your website, bio or QR code.
Mailto Link Generator
Build mailto: links with recipient, CC, BCC, subject and body text, plus the HTML code.
Click-to-Call & SMS Link Generator
Create tel: and sms: links so mobile visitors can call or text you with one tap.
Social Share Link Generator
Generate share links for Facebook, X, LinkedIn, WhatsApp, Telegram, Reddit, Pinterest and email — no scripts needed.
Google Maps Link & Embed Generator
Create Google Maps search and directions links and an embed map — no API key needed.
Google Review Link Generator
Create a direct link that opens the Google review form for your business from its Place ID.
Add to Calendar Link Generator
Create Add-to-Calendar links for Google Calendar and Outlook plus a downloadable .ics file for Apple Calendar.
Iframe Generator
Generate a responsive, accessible and lazy-loaded iframe embed code for any URL.
HTML Link Generator (nofollow, sponsored)
Build HTML anchor tags with the right rel attributes — nofollow, sponsored, ugc — and target options.
Email Address Obfuscator
Hide your email address from spam bots with HTML entity encoding, reversed text or a JavaScript link.
Telegram, Signal & Messenger Link Generator
Create direct chat links for Telegram, Signal, Viber, Facebook Messenger, Instagram DM, WhatsApp and SMS, with QR codes.
Payment Link Generator (PayPal, UPI, Venmo)
Create PayPal.me, UPI, Venmo, Cash App and Revolut payment links and QR codes with a pre-filled amount.
QR Code Scanner (from Image)
Read a QR code from a photo or screenshot — see the link, Wi-Fi password or text inside before you open it.
SEO Audit & Score
Run a complete on-page SEO audit with a score out of 100 and a prioritised fix list.
Popular
Meta Tags Analyzer
Inspect title, description, canonical, robots, Open Graph and every meta tag on a page.
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Meta Tag Generator
Generate perfectly sized SEO meta tags with a live Google preview.
Keyword Density Checker
Find the top 1, 2 and 3-word phrases on any page and their density.
Keyword Suggestion Tool
Discover hundreds of long-tail keyword ideas from real search suggestions.
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Open Graph Generator
Create Open Graph tags so your links look stunning on social media.
Twitter (X) Card Generator
Generate X/Twitter card meta tags with a live card preview.
Robots.txt Generator
Build a valid robots.txt with sitemaps, crawl rules and AI-bot controls.
Robots.txt Checker
Fetch and validate a robots.txt and test whether a URL is blocked.
XML Sitemap Checker
Validate an XML sitemap or sitemap index and list its URLs.
Server Status Checker
Check whether websites are online, with response time.
Website Complete Audit
Complete website audit: speed, Core Web Vitals, SEO, accessibility, DA/PA, spam score, domain age, SSL and hosting — with a fix for every issue.
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Page Size Checker
Measure HTML size, load time and the weight of scripts, styles and images.
WordPress Theme Detector
Detect the WordPress theme and plugins any site is using.
FAQ Schema Generator
Create FAQPage JSON-LD structured data for rich results.
SERP Snippet Preview
See exactly how your title and description will look on Google desktop and mobile.
Screen Resolution Simulator
Preview any website at popular phone, tablet and desktop resolutions.
AdSense Revenue Calculator
Estimate daily, monthly and yearly AdSense earnings.
Heading Checker (H1–H6)
See the full H1–H6 outline of any page and find missing H1s, skipped levels and empty headings.
Image Alt Text Checker
Find every image on a page with missing, empty or poor alt text.
Hreflang Checker
Validate hreflang tags: language codes, self-reference, x-default and return links on every alternate.
Structured Data & Schema Checker
Extract JSON-LD, microdata and RDFa from a page and check required properties for Google rich results.
Security Headers Checker
Grade a site's HTTP security headers: HSTS, CSP, X-Frame-Options, Referrer-Policy and more.
Gzip & Brotli Compression Checker
Test whether a page is served with gzip or Brotli compression and how much bandwidth it saves.
HTTP/2 & HTTP/3 Checker
Check which HTTP protocol versions a website supports: HTTP/1.1, HTTP/2 and HTTP/3 (QUIC).
Mixed Content Checker
Find insecure http:// scripts, styles, images and iframes on an HTTPS page.
Website Technology Checker
Find out what a website is built with: CMS, frameworks, analytics, CDN, server and more.
Text to HTML Ratio Checker
Measure how much of a page is readable text compared with HTML code.
Favicon Checker
Find and test every favicon, Apple touch icon and web app manifest icon of a website.
Bulk Title & Meta Description Checker
Check the title tag and meta description of up to 20 URLs at once, with lengths and duplicates.
Bulk Noindex & Indexability Checker
Check up to 20 URLs for noindex, X-Robots-Tag, robots.txt blocks, canonicals and status codes.
Website Response Time (TTFB) Checker
Measure DNS, connect, TLS, time to first byte and total load time of any URL.
Cookie Checker
List the cookies a website sets and check their Secure, HttpOnly and SameSite flags.
AI Crawler Access Checker
Check whether GPTBot, ClaudeBot, PerplexityBot, Google-Extended and other AI bots may crawl your site.
llms.txt Checker
Validate a site's llms.txt file: format, sections, links and llms-full.txt.
Ads.txt Validator
Validate ads.txt or app-ads.txt records, find syntax errors and confirm your AdSense entry.
XML Sitemap Generator
Create a valid sitemap.xml from a list of URLs, with lastmod, changefreq and priority.
Breadcrumb Schema Generator
Create BreadcrumbList JSON-LD so Google shows your site path instead of the URL in search results.
Organization Schema Generator
Generate Organization JSON-LD with logo, contact details, address and social profiles for your brand.
Local Business Schema Generator
Create LocalBusiness JSON-LD with address, opening hours, geo coordinates and price range for local SEO.
Article Schema Generator
Generate Article, BlogPosting or NewsArticle JSON-LD with author, dates, images and publisher.
Product Schema Generator
Generate Product JSON-LD with price, availability, brand, SKU, GTIN and review rating for rich results.
HowTo Schema Generator
Generate HowTo JSON-LD with steps, total time, cost, supplies and tools.
Event Schema Generator
Create Event JSON-LD for in-person, online or hybrid events with dates, venue, organizer and tickets.
Job Posting Schema Generator
Generate JobPosting JSON-LD for Google for Jobs: title, salary, location or remote, dates and company.
Recipe Schema Generator
Generate Recipe JSON-LD with ingredients, steps, cook times, yield, cuisine and calories.
Video Schema Generator
Generate VideoObject JSON-LD for videos, with automatic thumbnail and embed URL for YouTube links.
Person Schema Generator
Create Person JSON-LD for author and about pages: job title, employer, expertise and profile links.
Website Word Counter
Count the words on any web page, with reading time, headings, paragraphs and the most used words.
Website Screenshot Generator
Take a screenshot of any website on mobile or desktop — including a full-page capture — rendered in real Chrome.
HTML Validator (W3C)
Validate the HTML of any page with the official W3C checker and list every error and warning with its line.
Website Carbon Calculator
Estimate how much CO₂ a web page produces per visit, check green hosting and see how it compares.
Hreflang Tag Generator
Generate hreflang link tags, HTTP headers and XML sitemap entries for multilingual and multi-region sites.
llms.txt Generator
Create an llms.txt file that tells AI assistants what your site is about and which pages matter most.
security.txt Generator
Generate an RFC 9116 security.txt file so researchers know how to report vulnerabilities on your site.
Web App Manifest Generator (PWA)
Create a site.webmanifest for installable web apps (PWA) with name, colours, display mode and icons.
Keyword Match Type Generator
Turn a keyword list into Google Ads broad, "phrase", [exact] and negative match types in one click.
Keyword Combiner (Mixer)
Combine two or three keyword lists into every possible phrase for SEO and PPC — with match types.
Google Search Operator Generator
Build advanced Google searches with site:, intitle:, inurl:, filetype:, exact phrases and dates — plus ready SEO audit queries.
Review Schema Generator
Generate Review and AggregateRating JSON-LD for products, books, courses, software and more to earn star ratings.
Privacy Policy Generator
Create a free privacy policy for your website or app — covering cookies, Google Analytics, AdSense, GDPR and CCPA.
Terms and Conditions Generator
Generate terms and conditions for a website, blog, SaaS or online store — accounts, payments, content and liability.
DA PA Checker
Bulk-check the authority score, Open PageRank, global rank and referring domains of up to 20 websites.
Popular
Domain Authority Checker
Full authority report for any website: authority score, PageRank, rank, referring domains, SEO score, domain age, SSL and hosting.
Page Authority Checker
Check the on-page SEO score of any URL together with the authority of the site it belongs to.
PageRank Checker
Check the Open PageRank score (0–10), global rank and monthly PageRank history of any website.
Backlink Checker
See how many websites link to a domain, its link strength and history, and your backlink gap against competitors.
Whois Domain Lookup
Registrar, dates, nameservers and status for any domain.
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Domain Age Checker
Find out exactly how old a domain is and when it expires.
DNS Records Checker
Look up A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records.
Domain to IP
Find the IP addresses a domain resolves to.
Hosting Checker
Find out who hosts any website, with network and location details.
SSL Certificate Checker
Verify an SSL certificate: issuer, validity, expiry and covered domains.
Blacklist Checker
Check whether a domain or IP is listed on major spam blacklists.
Wayback Machine Checker
See when a site was first archived and browse its saved snapshots.
What Is My IP
See your public IP address and network details.
Email Deliverability Checker
Score a domain's email setup: MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT and BIMI in one check.
SPF Record Checker
Validate an SPF record, count DNS lookups (max 10) and see the full include tree.
DMARC Record Checker
Look up and explain a domain's DMARC policy, reporting addresses and alignment settings.
DKIM Record Checker
Find DKIM keys on common selectors or a selector you enter, and check key type and size.
DNS Propagation Checker
Check a DNS record on 12 public resolvers worldwide to see if your change has propagated.
Nameserver Checker
Test every nameserver of a domain: authoritative answers, matching SOA serials and network diversity.
Reverse DNS Lookup
Find the PTR hostname of up to 20 IP addresses and check forward-confirmed reverse DNS.
IP Address Lookup
Look up any IP or domain: country, network owner, IP range, provider and reverse DNS.
TLS Version Checker
Test which TLS versions (1.0, 1.1, 1.2, 1.3) a server accepts and spot outdated protocols.
Domain Availability Checker
Check if up to 20 domain names are available to register, using official registry data.
Domain Expiry Checker
Check the expiration date and days left for up to 20 domains, sorted by the soonest.
Open Port Checker
Check whether ports such as 22, 80, 443, 3306 or 25 are open on any domain or IP, from our server.
Ping Test (TCP Ping)
Ping a website or server from our server and see response time, jitter and packet loss.
Subdomain Finder
Find the subdomains of any domain from public SSL certificate transparency logs — passive and safe.
Popular
BIMI Record Checker
Check a domain’s BIMI record, logo (SVG Tiny PS), VMC certificate and DMARC enforcement for brand logos in email.
MTA-STS Checker
Check MTA-STS and TLS-RPT for a domain: DNS record, policy file, mode and MX coverage.
DNSSEC Checker
Check whether a domain is protected by DNSSEC: DS records, DNSKEYs, algorithms and validation status.
Email Header Analyzer
Paste email headers to trace the delivery path and delays, and check SPF, DKIM, DMARC and spoofing signs.
Email Address Validator
Check up to 50 email addresses: format, domain, MX mail servers, disposable inboxes, role addresses and typos.
Domain Name Generator
Get hundreds of brandable domain name ideas from your keywords, then check which ones are free to register.
YouTube Tag Extractor
Extract the hidden tags from any YouTube video.
Popular
YouTube Tag Generator
Generate SEO tags for your video from real YouTube searches.
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YouTube Hashtag Extractor
Pull every hashtag from a video title and description.
YouTube Hashtag Generator
Generate trending hashtags for your next video.
YouTube Title Extractor
Get the exact title of any YouTube video.
YouTube Title Generator
Generate click-worthy video titles from a keyword.
YouTube Description Extractor
Copy the full description of any YouTube video.
YouTube Description Generator
Write a structured, SEO-friendly video description in seconds.
YouTube Embed Code Generator
Create responsive embed code with autoplay, start time and more.
YouTube Thumbnail Downloader
Download any video thumbnail in HD, SD and all sizes.
Popular
YouTube Channel ID Finder
Find the channel ID of any YouTube channel or @handle.
YouTube Video Statistics
Views, likes, comments, duration and publish date of any video.
YouTube Channel Statistics
Subscribers, total views and video count of any channel.
YouTube Money Calculator
Estimate how much a YouTube channel can earn from ads.
YouTube Region Restriction Checker
See in which countries a video is blocked or allowed.
YouTube Channel Logo Downloader
Download the profile picture of any channel in full size.
YouTube Channel Banner Downloader
Download the banner art of any YouTube channel.
YouTube Channel Search
Search YouTube channels by keyword.
YouTube Trending Videos
See what is trending on YouTube in any country right now.
YouTube Timestamp Link Generator
Create YouTube links that start at a specific time, embed start codes and chapter lists for the description.
YouTube Comment Picker (Giveaway)
Pick random winners from YouTube video comments for giveaways — filter by keyword, one entry per person.
YouTube Playlist Length Calculator
Calculate the total length of a YouTube playlist and the watch time at 1.25×, 1.5× and 2× speed.
Image Compressor
Compress JPG, PNG and WebP images in your browser — make photos smaller without visible quality loss.
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Image Resizer
Resize images to exact pixels or a percentage, keeping the aspect ratio. Bulk resize, no upload.
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Image Cropper
Crop images to 1:1, 16:9, 4:3, 9:16 or a custom size, positioned where you want.
Image Converter (JPG, PNG, WebP)
Convert images between JPG, PNG and WebP in bulk — including HEIC, GIF, BMP and AVIF inputs your browser can open.
Popular
Rotate & Flip Image
Rotate images by 90, 180 or 270 degrees and flip them horizontally or vertically.
SVG to PNG Converter
Convert SVG files or code to high-resolution PNG, JPG or WebP at any size.
Image to Base64 Converter
Convert an image to a Base64 data URI, with ready-to-paste HTML and CSS code.
Base64 to Image Converter
Decode a Base64 string or data URI back to an image you can preview and download.
Favicon Generator
Create favicon.ico, Apple touch icon, Android icons and a web manifest from one image — download as a ZIP.
Popular
EXIF Data Viewer
See the hidden metadata of a photo: camera, lens, settings, date and GPS location.
EXIF Remover (Remove Photo Metadata)
Remove GPS location, camera details and other metadata from photos — losslessly for JPG and PNG.
Image Color Picker & Palette
Pick any colour from an image by clicking it, and get the image's dominant colour palette.
Photo Filter Editor
Adjust brightness, contrast, saturation, blur and hue or apply grayscale, sepia and invert filters.
Add Watermark to Image
Add a text watermark to photos — in a corner, centred or tiled — with your colour and opacity.
Meme Generator
Make a meme from any image with classic top and bottom text.
Image Size & Dimensions Checker
Check the width, height, aspect ratio, megapixels and file size of images.
Placeholder Image Generator
Create placeholder images of any size with custom colours and text, as PNG, JPG, WebP or SVG.
Image to Text (OCR)
Extract text from images, photos and screenshots with OCR in 10 languages — runs in your browser, nothing uploaded.
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GIF Maker (Images to GIF)
Create an animated GIF from photos or frames — set the size, speed and looping. Free, no watermark.
Photo Collage Maker
Combine photos into a grid, row or column collage with spacing and a background colour.
Image Splitter (Grid Cutter)
Cut an image into equal tiles — rows and columns — for Instagram grids, carousels or puzzles.
Circle Crop Image
Crop photos into a perfect circle with a transparent background — ideal for profile pictures.
Blur Image / Pixelate Faces
Blur, pixelate or black out faces, number plates and private text in a photo — drag to select areas.
Remove White / Solid Background
Make the white or solid-colour background of logos, signatures and product photos transparent (PNG).
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Image to ASCII Art
Convert a photo or logo into ASCII text art you can copy into chats, code comments and terminals.
Add Border to Image
Add a coloured border, padding, rounded corners or a drop shadow to photos — one or many at once.
Change Image DPI
Set the DPI of JPG and PNG images (e.g. 300 DPI for print) without re-compressing or changing the pixels.
Passport Photo Maker
Make passport and visa photos in the right size (US 2×2, UK/EU 35×45 mm and more) plus a 4×6 print sheet.
Popular
Image to SVG Converter (Vectorize)
Trace PNG and JPG logos, icons and drawings into scalable SVG vector graphics.
HEIC to JPG Converter
Convert iPhone HEIC / HEIF photos to JPG or PNG in your browser — batch convert, no upload.
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Image Compare (Find Differences)
Compare two images with a before/after slider and a pixel difference map that highlights every change.
Screenshot Beautifier
Turn screenshots into polished images with a gradient background, browser frame, rounded corners and shadow.
Social Media Image Resizer
Resize photos for Instagram, Facebook, X, LinkedIn, YouTube and Pinterest — fit with a blurred background, no cropping.
Open Graph Image Generator
Design social share images (1200×630 OG, X card, YouTube thumbnail, Instagram, Pinterest) with your title, colours and logo.
Screenshot Editor – Edit Text in Screenshots
Change the text in any screenshot or image with a matching font, size and colour, erase, blur or pixelate parts — then download at full quality.
Popular
Image to PDF Converter (JPG, PNG to PDF)
Combine JPG, PNG and WebP images into one PDF in your browser — A4, Letter or fit-to-image pages, no upload.
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Merge PDF
Combine several PDF files into one document, in the order you choose. Private: files never leave your device.
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Split PDF
Split a PDF into single pages or custom page ranges and download each part (or all as a ZIP).
Organize PDF Pages (Reorder & Delete)
Reorder, delete, duplicate or reverse PDF pages and save a new PDF — right in your browser.
Rotate PDF Pages
Rotate all or selected pages of a PDF by 90°, 180° or 270° and save it permanently.
Add Page Numbers to PDF
Number the pages of a PDF — choose the position, format, size and starting number.
Watermark PDF
Stamp a text watermark such as CONFIDENTIAL or DRAFT across every page of a PDF.
PDF to Image (PDF to JPG, PNG)
Convert every page of a PDF to a high-quality PNG or JPG image at the DPI you need.
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PDF Metadata Viewer & Editor
See a PDF’s title, author, creator, dates and page size — and change or remove them.
Compress PDF
Reduce PDF file size in your browser — lossless clean-up or strong compression for scanned PDFs. No upload.
Popular
PDF to Text Converter
Extract all the text from a PDF, page by page, and copy or download it as a .txt file.
Text to PDF Converter
Turn plain text into a clean, paginated PDF with your choice of font, size and page format.
Sign PDF (Add Signature)
Sign a PDF online: draw, type or upload your signature and place it on the page — free and private.
Crop PDF
Trim the margins of PDF pages by millimetres — all pages or selected ones — without losing quality.
Resize PDF (Change Page Size)
Change PDF page size to A4, Letter, A3, A5 or Legal, scaling content proportionally and keeping text selectable.
Multiple Pages per Sheet (N-up PDF)
Put 2, 4 or 6 PDF pages on one sheet to print handouts, slides and notes on less paper.
Compare PDF Files
Compare the text of two PDF documents and highlight every added and removed line.
PDF Word Counter
Count the words, characters and pages in a PDF, with reading time and a per-page breakdown.
Add Image or Logo to PDF
Place a logo, stamp or image on PDF pages — choose the position, size, opacity and pages.
Convert PDF to Grayscale
Turn a colour PDF into black and white (grayscale) for cheaper printing.
Flatten PDF
Flatten PDF form fields so filled-in values cannot be changed — or rasterise pages to burn in comments and annotations.
Add Header and Footer to PDF
Add a custom header and footer to every PDF page — with page numbers, total pages, date and file name.
Free Invoice Generator
Create a professional PDF invoice in your browser — logo, line items, tax, discount and payment details. No sign-up.
Online PDF Editor – Edit PDF Free
Edit PDF files online: change existing text, add text, images, signatures, highlights and whiteout, delete pages — then download. No upload.
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Audio Cutter (MP3 Cutter)
Cut and trim MP3, WAV, M4A or OGG audio online — pick start and end, add fades, save as MP3 or WAV.
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Audio Joiner (Merge MP3)
Join several audio files into one track, in order, with optional silence between them.
Audio Converter (to MP3, WAV)
Convert audio files to MP3 or WAV in your browser — choose the bitrate, sample rate and mono/stereo.
Video to MP3 Converter
Extract the audio from MP4, WebM or MOV videos and save it as MP3 or WAV — without uploading the video.
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Volume Booster (Make Audio Louder)
Make quiet audio louder or normalise it to full volume, with soft limiting to avoid harsh clipping.
Online Voice Recorder
Record your voice from the microphone and download it as WebM or MP3 — free, no sign-up, private.
Online Screen Recorder
Record your screen, a window or a browser tab with optional microphone audio — no install, no watermark.
Video to GIF Converter
Turn a clip from an MP4 or WebM video into an animated GIF — choose start, end, size and frame rate.
Mic Test (Microphone Checker)
Test your microphone online: live volume meter, waveform, device details and a playback recording.
Webcam Test (Camera Checker)
Check that your webcam works: live preview, resolution, frame rate and a test photo.
Audio Speed Changer
Speed up or slow down audio and podcasts (0.25×–4×) while keeping the voice pitch natural.
Reverse Audio
Play any audio file backwards and download it as MP3 or WAV.
MP3 Tag Editor (ID3)
View and edit MP3 ID3 tags — title, artist, album, year, genre, track and cover art — or remove all tags.
Online Tone Generator
Generate a sine, square, triangle or sawtooth tone at any frequency — play it or download a WAV.
White Noise Generator
Play and download white, pink or brown noise for sleep, focus, studying and tinnitus relief.
Online Metronome
A free online metronome with tempo from 20 to 300 BPM, accented first beat and adjustable time signature.
BPM Tapper (Tap Tempo)
Find the tempo of any song: tap along to the beat and get the BPM instantly.
Video Frame Extractor
Extract frames from a video as JPG or PNG images every few seconds — download them all as a ZIP.
Video Metadata Viewer
See a video file’s duration, resolution, aspect ratio, frame rate, bitrate and size — without uploading it.
Audio Pitch Changer
Change the pitch of a song or voice by up to ±12 semitones without changing its speed — save as MP3 or WAV.
Online Tuner (Guitar, Bass, Ukulele)
Tune your guitar, bass, ukulele, violin or any instrument with your microphone — chromatic, accurate to the cent.
Color Converter (HEX, RGB, HSL, CMYK)
Convert colours between HEX, RGB, HSL, HSV and CMYK — paste any CSS colour or name.
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Color Palette Generator
Generate complementary, analogous, triadic, tetradic and monochromatic colour palettes from one colour.
Color Contrast Checker (WCAG)
Check text and background colour contrast against WCAG 2.2 AA and AAA, with a fix suggestion.
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CSS Gradient Generator
Create linear, radial and conic CSS gradients with up to three colours and copy the code.
CSS Box Shadow Generator
Design CSS box shadows with offset, blur, spread, colour, opacity and inset — live preview.
CSS Border Radius Generator
Round each corner of an element and copy the border-radius CSS.
CSS Flexbox Generator
Build flexbox layouts visually: direction, justify, align, wrap and gap with a live preview.
CSS Grid Generator
Create CSS grid layouts with columns, rows, gap and responsive auto-fit — live preview.
CSS Text Shadow Generator
Design CSS text shadows with offset, blur, colour and opacity, previewed on your own text.
CSS Unit Converter (px, rem, em, pt)
Convert between px, rem, em, pt, %, vw, vh, in, cm and mm with your own base font size.
Glassmorphism CSS Generator
Create frosted-glass CSS effects with background blur, transparency and saturation.
Aspect Ratio Calculator
Find the aspect ratio of any size and calculate the missing width or height when resizing.
Color Shades Generator (50–950)
Generate a full 50–950 shade scale from one colour, with CSS variables and Tailwind config.
Color Blindness Simulator
See how an image or colour palette looks with protanopia, deuteranopia, tritanopia and achromatopsia.
CSS Clip-path Generator
Create CSS clip-path shapes — triangles, polygons, stars, arrows, circles — with a live preview.
CSS clamp() Generator (Fluid Typography)
Generate a fluid CSS clamp() value that scales font sizes or spacing smoothly between two screen widths.
Color Name Finder
Find the closest CSS colour name for any hex code, using the perceptual CIEDE2000 colour difference.
Cubic Bezier Generator (CSS Easing)
Build CSS cubic-bezier() easing curves with presets, a curve graph and a live animation preview.
PPI Calculator (Pixel Density & DPI)
Calculate a screen’s pixel density (PPI), dot pitch and physical size, plus the print size of an image at any DPI.
CSS Sprite Generator
Combine icons into one sprite sheet PNG and get the CSS background-position classes for each.
CSS Button Generator
Design CSS buttons with colours, hover state, padding, radius, border and shadow — live preview and code.
CSS Loader & Spinner Generator
Generate pure-CSS loading spinners, dots, bars, pulse and ring animations in your colour and size.
CSS Animation Generator
Create CSS keyframe animations — fade, slide, zoom, bounce, shake, pulse, spin, flip — with live preview.
SVG Wave Generator
Generate smooth, peaked or stepped SVG waves for section dividers — layers, colour, height and randomness.
SVG Blob Generator
Create random organic SVG blob shapes for backgrounds and illustrations, with optional gradients.
CSS Background Pattern Generator
Make pure-CSS background patterns — stripes, dots, grid, checkerboard, zigzag, diagonal lines and more.
Color Mixer
Mix two colours at any ratio and get an even colour scale — in perceptual OKLab or sRGB — with CSS color-mix().
Neumorphism Generator (Soft UI)
Generate soft-UI neumorphism CSS — flat, concave, convex or pressed — with shadows matched to your colour.
CSS Specificity Calculator
Calculate the specificity (a, b, c) of CSS selectors and see which rule wins — supports :is(), :not(), :has() and :where().
SVG Optimizer (Minify SVG)
Shrink SVG files by removing editor metadata, comments, hidden junk and extra decimals — with a live preview.
Type Scale Generator
Create a harmonious typographic scale (major third, perfect fourth, golden ratio…) with CSS variables and fluid clamp() sizes.
CSS Filter Generator
Create CSS filter effects — blur, brightness, contrast, grayscale, hue, sepia, drop-shadow — with a live before/after preview.
CSS Transform Generator
Build CSS transforms — translate, rotate, scale, skew and 3D perspective — with a live preview and copy-ready code.
CSS Scrollbar Generator
Style custom scrollbars for Chrome, Edge, Safari and Firefox — width, colours, hover and rounded thumb — with a live preview.
CSS Toggle Switch Generator
Design accessible on/off toggle switches in pure CSS — size, colours and shape — and copy the HTML and CSS.
Golden Ratio Calculator
Find golden ratio (1.618) proportions for any size, a golden sequence and golden typography line height and width.
Percentage Calculator
Calculate X% of Y, what percent X is of Y, percentage change and increase or decrease by a percentage.
Popular
Discount Calculator
Work out the sale price and savings, including stacked discounts and sales tax.
VAT / GST Calculator
Add or remove VAT, GST or sales tax at any rate and see net, tax and gross amounts.
Loan EMI Calculator
Calculate the monthly payment (EMI), total interest and yearly amortization of any loan or mortgage.
Popular
Compound Interest Calculator
See how savings grow with compound interest and monthly contributions, year by year.
Profit Margin Calculator
Calculate gross margin, markup and profit, or the selling price needed for a target margin.
ROI Calculator
Calculate return on investment and annualised ROI (CAGR) for any investment or campaign.
CPM, CPC, CTR & ROAS Calculator
Calculate advertising metrics — CPM, CTR, CPC, conversion rate, CPA and ROAS — from your campaign numbers.
Popular
Break-Even Calculator
Find how many units you must sell to cover fixed costs, and the revenue needed to break even.
BMI Calculator
Calculate body mass index in metric or imperial units and see the healthy weight range for your height.
Tip Calculator
Calculate the tip and split the bill between people, with optional rounding up.
Average & Statistics Calculator
Calculate the mean, median, mode, range, standard deviation, variance and quartiles of a list of numbers.
Random Number Generator
Generate secure random numbers in any range — one or thousands, unique or sorted.
Salary to Hourly Calculator
Convert pay between hourly, daily, weekly, monthly and yearly salary.
Roman Numeral Converter
Convert numbers to Roman numerals (1–3999) and Roman numerals back to numbers.
Number to Words Converter
Write numbers in words for cheques and invoices, including currency amounts and the lakh/crore system.
Age Calculator
Calculate exact age in years, months and days, total days and weeks, and days until the next birthday.
Popular
Date Difference Calculator
Count the days, weeks, months and working days between two dates.
Add or Subtract Days from a Date
Add or subtract days, business days, weeks, months or years from any date.
Time Zone Converter
Convert a date and time between time zones worldwide, with daylight saving applied automatically.
Temperature Converter (°C, °F, K)
Convert temperatures between Celsius, Fahrenheit, Kelvin and Rankine.
Length Converter
Convert length and distance: mm, cm, m, km, inches, feet, yards, miles and nautical miles.
Weight Converter (kg, lb, oz)
Convert weight and mass: mg, g, kg, tonnes, ounces, pounds, stone and tons.
Area Converter
Convert area: square metres, square feet, acres, hectares, square miles and more.
Volume Converter
Convert volume: ml, litres, cups, fluid ounces, pints, quarts and US or UK gallons.
Speed Converter
Convert speed: km/h, mph, m/s, knots, feet per second and Mach.
Data Storage Converter (MB, GB, TB)
Convert data sizes: bits, bytes, KB, MB, GB, TB and binary KiB, MiB, GiB, TiB.
Time Unit Converter
Convert time units: milliseconds, seconds, minutes, hours, days, weeks, months and years.
Energy Converter (J, kWh, kcal, BTU)
Convert energy between joules, kilojoules, calories, kilocalories, watt-hours, kWh, BTU, electronvolts and therms.
Pressure Converter (bar, psi, Pa, atm)
Convert pressure between pascals, kPa, bar, millibar, psi, atmospheres, mmHg and inHg.
Power Converter (W, kW, hp)
Convert power between watts, kilowatts, megawatts, mechanical and metric horsepower and BTU per hour.
Frequency Converter (Hz, MHz, RPM)
Convert frequency between hertz, kHz, MHz, GHz, revolutions per minute and radians per second.
Angle Converter (Degrees, Radians)
Convert angles between degrees, radians, gradians, arcminutes, arcseconds, turns and mils.
Torque Converter (Nm, lb-ft)
Convert torque between newton-metres, pound-feet, pound-inches, kgf·m and ounce-inches.
Fuel Economy Converter (MPG, L/100km)
Convert fuel consumption between mpg (US and UK), litres per 100 km, km per litre and miles per litre.
Cooking Measurement Converter
Convert cups, tablespoons, teaspoons, millilitres, grams and ounces for flour, sugar, butter and other ingredients.
Shoe Size Converter (US, UK, EU)
Convert adult shoe sizes between US men's, US women's, UK, EU and foot length in centimetres.
Mortgage Affordability Calculator
Estimate how much house you can afford from income, debts, down payment and rate, using the 28/36 rule.
Savings Goal Calculator
Find how much to save each month to reach a savings goal by a target date, with interest.
Inflation Calculator
See how inflation affects prices and the purchasing power of money over time at any inflation rate.
Simple Interest Calculator
Calculate simple interest and the total amount for any principal, rate and time.
Credit Card Payoff Calculator
Find how long it takes to pay off a credit card and the interest you will pay — or the payment needed to clear it by a date.
SIP Calculator
Calculate the future value of a monthly SIP investment in mutual funds, with an optional yearly step-up.
Commission Calculator
Calculate sales commission and total pay from the sale amount, commission rate and base salary.
Freelance Hourly Rate Calculator
Work out the hourly and day rate to charge as a freelancer from your income goal, expenses, taxes and billable hours.
Budget Calculator (50/30/20 Rule)
Split your monthly income into needs, wants and savings with the 50/30/20 budgeting rule.
Customer Lifetime Value (LTV) Calculator
Calculate customer lifetime value and the LTV:CAC ratio from order value, purchase frequency, lifespan and margin.
Engagement Rate Calculator
Calculate social media engagement rate by followers or reach for Instagram, TikTok, LinkedIn and more.
Churn Rate Calculator
Calculate customer churn rate, retention rate and average customer lifetime for a period.
NPS Calculator (Net Promoter Score)
Calculate your Net Promoter Score from the number of promoters, passives and detractors.
A/B Test Significance Calculator
Check whether an A/B test result is statistically significant: conversion rates, lift, confidence and p-value.
Sample Size Calculator
Calculate how many survey responses you need for a confidence level and margin of error.
Calorie Calculator (TDEE & BMR)
Calculate how many calories you need a day to maintain, lose or gain weight, with BMR and macros.
Popular
Body Fat Calculator (U.S. Navy)
Estimate body fat percentage from height, neck, waist and hip measurements with the U.S. Navy method.
Pregnancy Due Date Calculator
Find your baby’s due date from your last period, conception or IVF transfer date — with week-by-week milestones.
Ovulation Calculator (Fertile Days)
Estimate your ovulation day, fertile window and next period for the next six cycles.
GPA Calculator
Calculate your semester and cumulative GPA on the 4.0 scale from letter grades or percentages and credits.
Grade Calculator (Weighted & Final Exam)
Work out your weighted course grade and the score you need on the final exam to reach your target.
Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers, with simplified results and steps.
Scientific Calculator
Free online scientific calculator: trigonometry, logs, powers, roots, factorials and constants, in degrees or radians.
Popular
Quadratic Equation Solver
Solve ax² + bx + c = 0 with real or complex roots, discriminant, vertex, factored form and steps.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of two or more numbers, with Euclid’s steps.
Prime Factorization Calculator
Check if a number is prime and find its prime factors, all divisors and their sum.
Ideal Weight Calculator
Find your ideal body weight by height with the Robinson, Miller, Devine and Hamwi formulas and the healthy BMI range.
Hours Calculator (Time Card)
Add up work hours from start and end times with breaks, overnight shifts, overtime and pay.
Currency Converter (Live Exchange Rates)
Convert between 50+ currencies with daily updated exchange rates — USD, EUR, GBP, INR, LKR, AED and more.
Popular
Week Number Calculator
Find the ISO week number of any date, the week’s start and end dates, and how many weeks the year has.
Day of the Week Calculator
Find what day of the week any date falls on — past or future — plus day of the year and leap year.
Zodiac Sign Calculator
Find your zodiac (star) sign, element and ruling planet from your birth date, plus your Chinese zodiac animal.
Retirement Calculator
Estimate your retirement savings, the income they can pay and how much you need to save each month.
Crypto Profit Calculator
Calculate crypto profit or loss, ROI and break-even price after buy and sell fees.
Stock Average Calculator
Calculate your average share price after several buys (averaging down) and your current gain or loss.
Electricity Cost Calculator
Calculate how much an appliance costs to run per day, month and year from its wattage and your electricity rate.
Trip Fuel Cost Calculator
Work out the fuel cost of a road trip from distance, fuel economy and fuel price, split between passengers.
Concrete Calculator
Calculate concrete volume for slabs, footings and columns in m³ or yd³, plus the number of premix bags.
Paint Calculator
Estimate how much paint you need for a room from the wall length, height, doors, windows and coats.
Tile Calculator (Flooring)
Calculate how many tiles or boxes you need for a floor or wall, including grout gaps and waste.
Unit Price Calculator (Best Deal)
Compare price per kg, litre or item for up to four products to find the best deal.
Running Pace Calculator
Calculate running pace per km and mile, speed, and predicted 5K, 10K, half marathon and marathon times.
Water Intake Calculator
Estimate how much water to drink per day from your weight, exercise and climate.
Sleep Calculator
Find the best time to go to bed or wake up, based on 90-minute sleep cycles.
Dog & Cat Age Calculator
Convert your dog’s or cat’s age into human years, adjusted for dog size.
Matrix Calculator
Calculate the determinant, inverse, transpose and rank of a matrix, or add, subtract and multiply two matrices.
Rounding Calculator
Round numbers to decimal places, significant figures or the nearest 10, 100 or 0.05 — with half-up, banker’s and other methods.
Permutation & Combination Calculator
Calculate nPr and nCr, with and without repetition, using exact big-number arithmetic.
Area Calculator
Calculate the area and perimeter of rectangles, squares, circles, triangles, trapezoids, ellipses and sectors.
Volume Calculator
Calculate the volume and surface area of boxes, cubes, cylinders, spheres, cones and pyramids, with litres.
Triangle Calculator
Solve triangles: angles, area and perimeter from three sides, or the missing side of a right triangle (Pythagoras).
Speed, Distance & Time Calculator
Calculate speed, distance or time — enter any two and get the third, in km/h, mph or m/s.
Ohm's Law Calculator
Calculate voltage, current, resistance and power — enter any two values (V = I × R, P = V × I).
Depreciation Calculator
Calculate asset depreciation with straight-line, declining balance, double-declining or sum-of-years methods and a full schedule.
Ratio Calculator
Solve A : B = C : D, simplify ratios, compare two ratios and list equivalent ratios.
Probability Calculator
Calculate the probability of A and B, A or B, not A, exactly one, neither, and of an event happening at least once in n tries.
One Rep Max (1RM) Calculator
Estimate your one-rep max from any set using five formulas, plus a training weight chart from 60% to 100%.
Heart Rate Zone Calculator
Find your maximum heart rate and five training zones by age, with the Karvonen method if you know your resting heart rate.
Bandwidth & Download Time Calculator
Work out how long a file takes to download at any speed, or how much monthly bandwidth a website needs.
Net Worth Calculator
Add up your assets and debts to see your net worth, debt-to-asset ratio and a breakdown of where your money is.
Debt-to-Income (DTI) Ratio Calculator
Calculate your front-end and back-end debt-to-income ratio and see how mortgage lenders will view it.
Online Stopwatch
A free online stopwatch with lap times, keyboard shortcuts and 1/100 second precision.
Countdown Timer
Set a countdown in hours, minutes and seconds or to any date — with an alarm sound and the time left in the tab title.
Pomodoro Timer
Stay focused with the Pomodoro technique: 25-minute focus sessions, short and long breaks and a sound at each change.
Dice Roller
Roll virtual dice — d4, d6, d8, d10, d12, d20 or d100 — with dice notation like 2d6+3 and fair, cryptographic randomness.
Article Rewriter
Rewrite text with synonyms to create a fresh version of your content.
Word Counter
Count words, characters, sentences, paragraphs and reading time.
Popular
Text Compare
Compare two texts and highlight every difference.
Case Converter
Convert text to UPPER, lower, Title, Sentence, camelCase and more.
Text to Hashtags
Turn any text or keyword list into ready-to-paste hashtags.
Backwards Text Generator
Reverse text, words or flip it upside down.
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences or words.
Remove Duplicate Lines
Delete duplicate lines from a list while keeping the original order.
Sort Lines Alphabetically
Sort lines A–Z, Z–A, by length, naturally by number, reverse or shuffle them.
Find and Replace Text
Find and replace words in text, with case-sensitive, whole-word and regex options.
Phrase Frequency Counter (N-grams)
Find the most repeated 2-, 3- and 4-word phrases in any text, with stop-word filtering.
Readability Score Checker
Score text with Flesch Reading Ease, Flesch–Kincaid, Gunning Fog, SMOG, Coleman–Liau and ARI, and find long sentences.
Remove Line Breaks
Join lines into one paragraph — fix text copied from PDFs and emails, optionally keeping paragraphs.
Text Cleaner
Clean messy text: extra spaces, empty lines, HTML tags, smart quotes, invisible characters and emoji.
Strip HTML Tags (HTML to Text)
Convert HTML to clean plain text with line breaks and bullet points, optionally keeping link URLs.
Fancy Text Generator
Turn text into 𝐛𝐨𝐥𝐝, 𝘪𝘵𝘢𝘭𝘪𝘤, 𝓈𝒸𝓇𝒾𝓅𝓉, 𝔣𝔯𝔞𝔨𝔱𝔲𝔯, ⓒⓘⓡⓒⓛⓔⓓ and upside-down Unicode styles for bios and posts.
Text Repeater
Repeat a word or text up to 10,000 times with a new line, space or comma between.
Random Name Picker
Pick one or more random winners from a list of names for giveaways, raffles and teams.
Add Prefix & Suffix to Lines
Add text before or after every line and number lines automatically.
Text Splitter (Thread Maker)
Split long text into parts by characters, words or lines — perfect for X threads and SMS.
Social Media Character Counter
Count characters against X, Instagram, LinkedIn, TikTok, YouTube, Facebook, SMS and meta tag limits.
List to Comma Separated Converter
Turn a column of items into a comma-separated list (with optional quotes) or split a list back into lines.
Invisible Character Detector
Find and remove hidden characters: zero-width spaces, non-breaking spaces, BOMs and direction marks.
Morse Code Translator
Translate text to Morse code and Morse code back to text.
NATO Phonetic Alphabet Converter
Spell any text in the NATO phonetic alphabet: Alfa, Bravo, Charlie…
Email Signature Generator
Create a professional HTML email signature with photo, title, phone and links for Gmail, Outlook and Apple Mail.
Text to Speech (Read Aloud)
Read any text aloud in your browser with your device’s voices — choose the voice, speed and pitch.
Citation Generator (APA, MLA, Chicago)
Create APA 7, MLA 9, Chicago and Harvard citations for websites, books and journal articles, with in-text citations.
Word Cloud Generator
Turn any text into a word cloud image of its most frequent words — choose colours and download a PNG.
Thread Splitter (X, Threads, Bluesky)
Split long text into a numbered thread that fits X/Twitter, Threads, Bluesky, Mastodon or LinkedIn limits.
Email Extractor
Extract every email address from text, HTML or documents — remove duplicates, sort and group by domain.
Caesar Cipher & ROT13
Encode and decode the Caesar cipher with any shift, ROT13, or brute-force all 25 shifts.
Text to Handwriting Converter
Turn typed text into realistic handwriting on lined, plain or grid paper — download A4 pages as images.
Invisible Character (Blank Text)
Copy an invisible character or blank text for empty names, messages and spacing in games, WhatsApp and Instagram.
Zalgo Text Generator (Glitch Text)
Create creepy glitch "zalgo" text with stacked combining marks — copy and paste anywhere.
Upside Down Text Generator
Flip text upside down (ʇxǝʇ uʍop ǝpısdn) or mirror it — copy and paste into any app.
Random Word Generator
Generate random nouns, verbs and adjectives for brainstorming, games, drawing prompts and names.
Speech to Text (Voice Typing)
Type with your voice in your browser — dictate in English, Sinhala, Tamil, Hindi and more, then copy the text.
Popular
Emoji Picker & Search
Search all 1,900+ emoji by name or category and copy them with one click.
Online Notepad
A simple online notepad that saves automatically in your browser — with word count and .txt download.
Instagram Line Break Generator
Keep line breaks and empty lines in Instagram captions and bios — and move hashtags below the caption.
Quote Image Maker
Turn a quote into a shareable image for Instagram, Facebook and X — choose colours, font and size.
Palindrome Checker
Check whether words, phrases or numbers are palindromes — ignoring spaces, punctuation and case — and find the longest one inside.
Braille Translator
Translate English text to Unicode Braille (Grade 1) and Braille back to text — with numbers and capitals.
Bionic Reading Converter
Convert text to bionic reading format — the start of every word in bold — to read faster, then copy the HTML.
Typing Speed Test (WPM)
Test your typing speed in words per minute and accuracy with a 30, 60 or 120-second test — or your own text.
JSON to JSON Schema
Generate a JSON Schema (draft 2020-12) from any JSON sample.
JSON Formatter & Validator
Beautify, minify and validate JSON with clear error messages.
MD5 & SHA Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.
Base64 Encoder / Decoder
Encode or decode Base64 text (UTF-8 safe).
Strong Password Generator
Generate secure random passwords in your browser.
Credit Card Generator (Test Numbers)
Generate Luhn-valid dummy card numbers for testing payment forms.
Credit Card Validator
Validate a card number with the Luhn check and detect its brand.
User Agent Detector
See and decode your browser user agent string.
What Is My Browser
Details about your browser, OS, screen, language and capabilities.
Screen Resolution Detector
Find your screen resolution, viewport and pixel ratio.
JSON to CSV Converter
Convert a JSON array to CSV, with nested objects flattened into columns.
CSV to JSON Converter
Convert CSV to a JSON array, with header detection, quoted fields and number parsing.
JSON to YAML Converter
Convert JSON to clean, readable YAML.
YAML to JSON Converter
Convert YAML (including multi-document files) to JSON and validate the syntax.
JSON to XML Converter
Convert JSON to well-formed XML, with @attributes and a custom root element.
XML to JSON Converter
Convert XML to JSON, keeping attributes, repeated elements and text.
XML Formatter & Validator
Beautify or minify XML and check it is well-formed.
JSON to TypeScript Interface
Generate TypeScript interfaces from a JSON sample, including nested objects and arrays.
HTML Beautifier
Format messy or minified HTML with clean indentation.
HTML Minifier
Minify HTML safely: remove comments and whitespace while keeping pre, textarea, script and style intact.
CSS Beautifier
Format minified or messy CSS into readable, indented code.
CSS Minifier
Minify CSS with the csso optimiser to make stylesheets smaller and faster.
JavaScript Beautifier
Format minified or messy JavaScript into readable code.
JavaScript Minifier
Minify JavaScript with Terser: compress, mangle names and strip comments.
SQL Formatter
Format SQL queries for MySQL, PostgreSQL, SQL Server, SQLite, BigQuery and more.
Markdown to HTML Converter
Convert Markdown (GitHub-flavoured) to HTML with a live, safe preview.
HTML to Markdown Converter
Convert HTML to clean Markdown with headings, lists, links, tables of text and code blocks.
HTML Viewer (Online HTML Editor)
Paste HTML, CSS and JavaScript and see it rendered instantly in a secure sandbox.
Regex Tester
Test regular expressions with live match highlighting, groups and replace — safely, with a timeout.
JWT Decoder & Verifier
Decode JSON Web Tokens, check expiry and verify HS, RS, PS and ES signatures — all in your browser.
UUID Generator (v4 & v7)
Generate random v4 or time-ordered v7 UUIDs in bulk, with formatting options.
Unix Timestamp Converter
Convert Unix timestamps (seconds, milliseconds, microseconds) to dates and dates to timestamps.
Cron Expression Explainer
Translate a cron expression into plain English and see the next 10 run times.
Chmod Calculator
Convert Linux file permissions between octal (755) and symbolic (rwxr-xr-x) form.
Bcrypt Hash Generator & Checker
Create bcrypt password hashes with a chosen cost, or verify a password against a hash.
Htpasswd Generator
Create a secure bcrypt .htpasswd line and .htaccess rules to password-protect a folder.
HTML Entity Encoder / Decoder
Encode special characters as HTML entities or decode entities back to text.
HMAC Generator
Generate HMAC-SHA1, SHA256, SHA384 or SHA512 signatures in hex and Base64.
Number Base Converter
Convert numbers between binary, octal, decimal, hex and any base from 2 to 36 — even very large numbers.
Text to Binary Converter
Convert text to binary (UTF-8) and binary back to text.
Text to Hex Converter
Convert text to hexadecimal (UTF-8 bytes) and hex back to text.
Password Strength Checker
Check how strong a password is: entropy, cracking time and common weaknesses — privately in your browser.
IP Subnet Calculator (CIDR)
Calculate network, broadcast, host range, mask and wildcard for any IPv4 CIDR — and split it into smaller subnets.
IPv6 Address Expander & Compressor
Expand or compress an IPv6 address, see its type, reverse DNS name and prefix range.
MAC Address Formatter & Generator
Convert a MAC address between colon, hyphen and Cisco formats, check its type, or generate a random MAC.
HTTP Status Codes List & Lookup
Look up any HTTP status code (200, 301, 404, 503…) with its meaning and SEO impact, or browse the full list.
MIME Type Lookup
Find the MIME (Content-Type) for a file extension, or the extensions for a MIME type, with server config lines.
JSON Diff (Compare JSON)
Compare two JSON documents and list every added, removed and changed value by its path.
Test Data Generator (Fake JSON, CSV, SQL)
Generate realistic fake user records as JSON, CSV or SQL inserts for testing and demos.
Barcode Generator (Code 128, EAN-13, UPC)
Create Code 128, EAN-13, EAN-8, UPC-A, Code 39, ITF-14 and more barcodes — download as PNG or SVG.
Markdown Table Generator
Turn CSV or cells copied from Excel / Google Sheets into a neatly aligned Markdown table.
HTML Table Generator
Convert CSV or spreadsheet cells into clean, accessible HTML table code with a live preview.
IBAN Validator
Check whether an IBAN is valid: country, length and MOD-97 check digits, with the bank and account part split out.
SSH Key Generator (RSA, Ed25519)
Generate an SSH key pair (Ed25519 or RSA 2048/4096) in OpenSSH format, right in your browser.
cURL to Code Converter
Convert curl commands to JavaScript fetch, Python requests, PHP cURL and Node.js axios code.
Popular
JSONPath Tester
Test JSONPath expressions against your JSON and see every matching value and its path.
XPath Tester
Run XPath queries on HTML or XML and list matching elements, attributes and text.
Crontab Generator
Build a cron schedule line with presets or custom fields, see the next run times and stop cron emails.
Docker Run to Compose Converter
Convert a docker run command into a docker compose.yaml service with ports, volumes and environment.
String Escape & Unescape
Escape or unescape text for JSON, JavaScript, HTML, XML, SQL, CSV, regex, shell and Unicode.
TOTP / 2FA Code Generator
Generate live 2FA codes (TOTP) from a Base32 secret, or create a new secret with an authenticator QR code.
ASCII Table & Character Codes
Full ASCII table (0–127) with decimal, hex, octal, binary and HTML codes — or look up any character.
SSL Certificate Decoder
Decode a PEM SSL/TLS certificate: domains (SANs), issuer, validity dates, key size and fingerprints.
CSR Decoder
Decode a certificate signing request (CSR) to check its common name, organisation, SANs and key strength before ordering SSL.
CSV to SQL Converter
Convert CSV into SQL CREATE TABLE and INSERT statements for MySQL, PostgreSQL, SQLite or SQL Server.
Base32, Base58 & Base85 Encoder / Decoder
Encode and decode text with Base32, Base58 (Bitcoin), Ascii85, Base36, Base64URL or hex.
HTML to JSX Converter
Convert HTML into React JSX: className, htmlFor, style objects, self-closing tags and event handlers.
Code to Image (Code Screenshot)
Turn code into a beautiful syntax-highlighted image with a window frame and gradient — perfect for social posts.
JSON to Go, Python, Java, C# Classes
Generate Go structs, Python dataclasses, Java, C#, Rust, Kotlin or PHP classes from a JSON sample.
ULID, NanoID & UUID v7 Generator
Generate ULIDs, NanoIDs, MongoDB ObjectIds and time-ordered UUID v7 identifiers in bulk.
WebSocket Tester
Connect to a WebSocket (wss://) server, send messages and watch the replies live in your browser.
IP Range to CIDR Converter
Convert an IPv4 range into the minimal list of CIDR blocks, or CIDR blocks into IP ranges.
File Checksum Calculator (MD5, SHA-256)
Calculate MD5, SHA-1, SHA-256, SHA-512 and CRC32 checksums of any file, and verify a download.
Nginx Config Generator
Generate an nginx server block for PHP, static sites, SPAs or reverse proxies — HTTPS, redirects, gzip and caching.
.gitignore Generator
Create a .gitignore file for Node, Python, PHP, Laravel, WordPress, Java, .NET, Go, Rust, editors and operating systems.
Open Source License Generator
Generate a LICENSE file — MIT, Apache 2.0, GPL-3.0, BSD, ISC, MPL-2.0, Unlicense — with your name and year.
Semver Checker (Version Range Tester)
Check if a version satisfies an npm semver range (^, ~, x, >=, ||), compare versions and get the next version.
Hex Viewer (Hex Dump)
View any file as a hex dump with offsets and ASCII, and identify its real type from the magic bytes.
JavaScript Keycode Tester
Press any key to see its event.key, event.code, keyCode and modifiers — the JavaScript keycode reference.
API Tester (Online REST Client)
Send GET, POST, PUT, PATCH and DELETE requests with headers and a JSON body, and inspect the response.
Popular
CORS Tester
Test whether a URL’s CORS headers let a browser on another origin call it — preflight and actual request.
MAC Address Vendor Lookup
Find the manufacturer of any MAC address from the official IEEE OUI registry — bulk lookup up to 100.
.env to JSON Converter
Convert .env files to JSON and JSON back to .env — handles quotes, comments, export and nested keys.
Binary Calculator
Add, subtract, multiply and divide binary, octal or hex numbers and run AND, OR, XOR, NOT and bit shifts — any size.
ISBN Validator & Converter
Validate ISBN-10 and ISBN-13 numbers, fix the check digit and convert between ISBN-10 and ISBN-13.
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