Free tools
Free HTML tools. Everything runs in your browser.
View, format, minify and convert HTML, check your meta tags and link previews — plus 94 more developer utilities. Nothing to install, nothing uploaded. When the page is ready, turn it into a private link.
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112 free tools
Featured
Tools for the HTML you ship
HTML Viewer & Live PreviewNew
Preview HTML instantly
HTML Formatter
Beautify & indent HTML
HTML Minifier
Compress HTML for production
Markdown to HTML
Render Markdown as HTML
HTML to Markdown
Convert HTML to Markdown
Open Graph Preview
Social card preview and QA pack
Meta Tags Generator
SEO & Open Graph launch QA pack
Structured Data Audit
JSON-LD QA and launch pack
Broken Link Audit
Find risky links before launch
HTML Entity Encoder / Decoder
Encode & decode HTML entities
HTML Table Generator
Visual table builder
HTML to JSX Converter
Convert HTML to React JSX
CSS Minifier & Beautifier
Compress or format CSS
SVG Optimizer
Minify and clean SVG markup
Favicon Generator
Letter favicons in seconds
QR Code Generator
Generate QR codes instantly
Website Accessibility Audit
Crawl a page for WCAG risks
JSON Formatter & Validator
Pretty-print & validate JSON
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More free tools
HTML Tools 4
CSS & Design 21
- Color Blindness SimulatorPreview designs through color-blind filters
- Color ConverterConvert HEX, RGB, HSL, HSV, CMYK instantly
- Color Palette GeneratorPalettes from one color
- CSS Animation GeneratorBuild @keyframes animations visually
- CSS Border Radius GeneratorVisual per-corner border-radius builder
- CSS Box Shadow GeneratorVisual box-shadow builder
- CSS Clamp CalculatorFluid typography sizing
- CSS Filter GeneratorVisual builder for CSS filter effects
- CSS Flexbox GeneratorBuild flexbox layouts visually with live preview
- CSS Gradient GeneratorLinear & radial gradient builder
- CSS Grid GeneratorVisual grid layout builder
- CSS Named ColorsBrowse & copy all 140 CSS color names
- CSS Specificity CalculatorAudit CSS cascade risk
- CSS Text Shadow GeneratorVisual text-shadow builder
- CSS Triangle GeneratorGenerate pure-CSS triangles with copy-ready code
- CSS Unit Converterpx → rem, em, vw, vh
- CSS Variables ExtractorExtract CSS custom properties
- CSS Variables GeneratorGenerate a custom CSS variable theme
- HTML Color CodesInteractive HEX, RGB, HSL color converter + reference
- Image Color PickerExtract colors from any image
- SVG to CSS Data URI EncoderSVG as background-image
Data & Text 50
- API Response DiffFind breaking response changes
- Aspect Ratio CalculatorCalculate & compare image aspect ratios
- Base64 Encode / DecodeBase64 payload QA pack
- Binary ↔ Text ConverterText to binary and back
- Byte / Bit ConverterConvert between bytes, KB, MB, GB, TB
- Case ConverterUPPER, lower, camelCase…
- Cookie Header InspectorAudit Set-Cookie headers before release
- CORS Preflight InspectorDebug browser API access before release
- CSP Header InspectorAudit Content-Security-Policy before release
- CSV CleanroomAudit messy CSV before import
- cURL to Fetch ConverterConvert curl to JS fetch / axios
- Duplicate Line RemoverRemove duplicate lines from text
- Email Address ValidatorValidate email format & anatomy
- Form Data InspectorDecode and rebuild API form payloads
- Hash GeneratorSHA-1, SHA-256, SHA-512 online
- Image Resize CalculatorCalculate new dimensions while preserving aspect ratio
- IP Address InfoParse IPv4/IPv6: binary, class, CIDR, private/public
- JSON DiffCompare two JSON objects
- JSON MinifierCompress JSON by removing whitespace
- JSONPath TesterQuery JSON with JSONPath expressions
- JSON Schema GeneratorInfer and validate API contracts
- JSON to CSV ConverterExport JSON arrays as CSV
- JSON to SQL INSERTJSON array → INSERT statements
- JSON to TypeScriptGenerate TypeScript interfaces
- JSON to YAMLConvert JSON to YAML format
- JWT DecoderDecode, audit & hand off JWT claims
- Line CounterCount, number, and filter lines in any text
- List Sorter & DeduplicatorSort, dedupe & shuffle lines
- Markdown Table GeneratorCSV → Markdown or HTML table
- Morse Code ConverterText ↔ Morse, with audio playback
- Number Base ConverterDecimal, Hex, Binary, Octal
- Number FormatterCommas, currency, scientific notation
- Number to WordsConvert numbers to English words
- Password Strength CheckerAnalyze password entropy and weaknesses
- Regex TesterLive regex match highlighting
- Roman Numeral ConverterInteger ⇄ Roman numerals
- SQL FormatterBeautify & minify SQL queries
- SQL Query BuilderBuild SELECT queries visually
- String Escape / UnescapeEscape, review, and hand off string contexts
- Text Diff ViewerCompare two blocks of text
- Text RepeaterRepeat any text N times with a separator
- Text StatisticsWords, chars, reading time & more
- Text to SpeechConvert text to audio using your browser
- Unit ConverterConvert length, weight, temperature & volume
- Unix Timestamp ConverterTimestamp ↔ human-readable date
- URL Encoder / DecoderURL encoding QA pack
- URL ParserParse, clean, and QA share URLs
- Webhook Signature VerifierVerify and generate HMAC webhook signatures
- Word Frequency CounterAnalyze word and phrase frequency
- YAML ↔ JSON ConverterConvert between YAML and JSON
Generators 17
- .htaccess Redirect GeneratorRedirect migration QA pack
- chmod CalculatorLinux file permission builder
- Cron Expression BuilderVisual cron schedule generator
- Fake Data GeneratorRandom names, emails & addresses
- HTTP Request Buildercurl, fetch & axios code generator
- Image to Base64Convert images to data URIs
- IP / CIDR CalculatorSubnet calculator & IP range
- JWT BuilderBuild & sign JWT tokens in-browser
- LLMs.txt GeneratorAI-readable site guide
- Lorem Ipsum GeneratorPlaceholder text for designs & mockups
- Password GeneratorGenerate strong, configurable passwords
- Robots.txt GeneratorCrawler rules made easy
- Security Headers GeneratorHeader audit and launch pack
- Text Encrypt / DecryptAES-GCM encrypt text in your browser
- URL Slug GeneratorSEO-friendly slugs
- UTM Link BuilderCampaign URL generator
- UUID GeneratorGenerate v4 UUIDs instantly
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