Developer Tools

Free online HTML formatter and beautifier. Instantly pretty-print, indent, and clean up messy HTML code. No installation required — runs entirely in your browser.

Free online CSS, SCSS, and Less formatter and beautifier. Instantly pretty-print stylesheets with configurable indentation. No sign-up needed — runs in browser.

Free online JavaScript and TypeScript formatter. Beautify ES6+, JSX, and TSX code with Prettier-style formatting. No install needed — instant in-browser formatting.

Free online JSON formatter, validator, and prettifier. Format, validate, and beautify JSON data with configurable indentation and key sorting. Instant results.

Free online SQL formatter for MySQL, PostgreSQL, T-SQL, and PL/SQL. Instantly beautify and indent SQL queries for maximum readability. No sign-up required.

Free online XML formatter and beautifier. Instantly pretty-print, indent, and tidy XML, SOAP, and SVG documents. Validates structure and highlights errors.

Free online YAML formatter and validator for YAML and TOML files. Format, beautify, and validate YAML for Kubernetes, Ansible, and Docker Compose configs.

Free online GraphQL formatter. Instantly beautify, indent, and format GraphQL queries, mutations, subscriptions, and schema SDL definitions. No install needed.

Free online PHP formatter and code beautifier. Instantly format and indent PHP 7/8 code with PSR-2/PSR-12 style. Paste and beautify — no install required.

Free online JSON validator. Instantly validate JSON syntax and structure with detailed line-level error messages. Check if your JSON is valid in seconds.

Free online HTML validator. Check HTML markup against W3C standards and detect errors, warnings, and accessibility issues. Instant client-side validation.

Free online CSS validator. Instantly check CSS stylesheets for syntax errors, invalid properties, and browser compatibility issues. No sign-up required.

Free online YAML validator and linter. Instantly validate YAML files for syntax errors, indentation issues, and structural problems. Perfect for CI/CD configs.

Free online JWT decoder. Instantly decode and inspect JSON Web Tokens — view header, payload claims, expiry, and verify token structure. No data sent to server.

Free online regex tester and debugger. Test regular expressions with live match highlighting, capture group display, and multi-line support. Instant results.

Free online email address validator. Instantly check if an email address has a valid format, detect common typos, and validate bulk email lists. No sign-up needed.

Free online Base64 encoder and decoder. Instantly encode text or files to Base64 and decode Base64 strings. Supports URL-safe Base64 and file uploads.

Free online URL encoder and decoder. Encode URL components with percent-encoding and decode encoded query strings. Supports full URL and component encoding.

Free online HTML entities encoder and decoder. Escape and unescape HTML special characters like <, >, &, and convert to named or numeric HTML entities.

Free online MD5 hash generator. Instantly compute the MD5 checksum of any text string in your browser. Useful for file integrity checks and data verification.

Free online SHA-256 hash generator. Compute cryptographic SHA-256 checksums from any text. Runs entirely in your browser using the Web Crypto API — 100% private.

Free online diff checker and text comparison tool. Compare two code or text blocks side-by-side with line-level diff, additions, and deletions highlighted.

Free online JSON diff tool. Compare two JSON objects side-by-side and highlight structural and value differences. Supports deep nested JSON comparison.

Free online XML diff and comparison tool. Compare two XML documents and visualize differences in elements, attributes, and values with color-coded output.

Free online Markdown editor and live preview. Write Markdown and see a rendered HTML preview in real time. Supports GitHub Flavored Markdown, tables, and code blocks.

Free online HTML live preview editor. Write HTML, CSS, and JavaScript and see an instant browser-sandboxed preview. Like CodePen but with no sign-up required.

Free online SVG viewer and editor. Upload or paste SVG code and get an instant live preview. Edit SVG source and see changes in real time. No install needed.

Free online JSON to YAML converter and YAML to JSON converter. Bidirectional conversion between JSON and YAML formats. Instant, accurate, and free.

Free online CSV to JSON converter. Convert CSV spreadsheet data to JSON and JSON back to CSV. Supports custom delimiters, headers, and nested structures.

Free online JSON to XML converter and XML to JSON converter. Bidirectional conversion between JSON and XML data formats. Instant, accurate, and free.

Free online Unix timestamp converter. Convert Unix epoch timestamps to human-readable dates and times across all timezones. Convert dates back to timestamps.

Free online color converter. Convert colors between HEX, RGB, RGBA, HSL, HSLA, and CSS named color formats. Instant color preview and CSS code output.

Free online SCSS to CSS compiler. Compile Sass/SCSS stylesheets to plain CSS instantly in your browser. Supports variables, nesting, mixins, and all Sass features.

Free online UUID generator. Generate cryptographically random UUID v4 identifiers in bulk. Copy single or multiple UUIDs instantly. No sign-up required.

Free online strong password generator. Create random, secure passwords with configurable length, uppercase, lowercase, numbers, and special character rules.

Free online Lorem Ipsum generator. Generate placeholder dummy text by words, sentences, or paragraphs. Perfect for mockups, wireframes, and UI design prototypes.

Free online fake JSON data generator. Generate realistic mock JSON data with names, emails, addresses, dates, UUIDs, and more. Perfect for API testing and prototypes.

Free online cron expression builder and parser. Visually create cron job schedules and get a plain-English explanation. Supports standard and extended cron syntax.

Free online JSON tree explorer and parser. Parse JSON and navigate its structure in an interactive collapsible tree view. Perfect for exploring large JSON files.

Free online CSV viewer and parser. Upload or paste CSV data and view it in a formatted, sortable table. Supports custom delimiters and large CSV files.

Free online XML tree explorer and parser. Parse XML documents and navigate their DOM tree structure interactively. View elements, attributes, and text nodes.

Free online JWT parser. Decode and inspect JSON Web Token claims in a structured, readable view. Verify token structure and view expiry — entirely in your browser.

Free online HTML minifier. Remove whitespace, comments, and redundant attributes from HTML to reduce file size and improve page load speed. Instant results.

Free online CSS minifier and compressor. Remove whitespace, comments, and redundancies from CSS stylesheets to reduce file size and improve load performance.

Free online JavaScript minifier. Compress and minify JS code to reduce bundle size and improve load performance. Removes whitespace, comments, and shortens variables.

Strip whitespace from JSON to minimize data transfer size.

Run Python, Java, C, C++, JavaScript, Go, Rust, PHP, Ruby, HTML, and SQL code directly in your browser — no install needed.