A curated collection of free, instant, browser-based developer tools for JSON formatting, data conversion, encoding, security, and more. All tools run 100% client-side β no uploads, no login, no data leaves your browser.
π Live Site: jsonformat.org
- JSON Formatter β Beautify, validate, and minify JSON with syntax highlighting
- JSON Viewer β Interactive tree viewer with collapsible nodes and search
- JSON Validator β Validate JSON syntax and get detailed error messages
- JSON Minify β Remove whitespace and compress JSON instantly
- JSON Compare β Side-by-side diff with color-coded additions, deletions, and changes
- JSON Escape β Escape or unescape special characters for JSON strings
- JSON to CSV β Convert JSON arrays to CSV with custom delimiters
- JSON to YAML β Transform JSON to clean, readable YAML
- JSON to XML β Convert JSON objects to XML with configurable root element
- JSON to TOML β Generate TOML config files from JSON
- JSON to TOON β Convert JSON to TOON format
- CSV to JSON β Parse CSV files into JSON arrays or objects
- YAML to JSON β Convert YAML to valid JSON instantly
- XML to JSON β Transform XML documents to JSON
- TOML to JSON β Parse TOML config files to JSON
- TOON to JSON β Convert TOON format to JSON
- CSV Formatter β Format and validate CSV with syntax highlighting
- YAML Formatter β Beautify and validate YAML files
- XML Formatter β Format and validate XML with indentation
- TOML Formatter β Format and validate TOML config files
- TOON Formatter β Format and validate TOON files
- HTML Formatter β Beautify and minify HTML with proper indentation
- CSS Formatter β Format and minify CSS stylesheets
- SQL Formatter β Format SQL queries with syntax highlighting
- HTML to Markdown β Convert HTML to clean Markdown
- Hash Generator β Generate MD5, SHA-1, SHA-256, SHA-512 hashes instantly
- Password Generator β Create secure random passwords with custom rules
- AES Encrypt/Decrypt β AES-128/192/256 encryption and decryption
- HMAC Generator β Generate HMAC signatures with multiple algorithms
- RSA Encrypt/Decrypt β RSA public-key encryption and decryption
- Base64 Encode/Decode β Encode text or files to Base64 and decode Base64 strings
- URL Encode/Decode β Encode and decode URL parameters and query strings
- JWT Decoder β Inspect JWT header, payload, and claims with signature verification
- Regex Tester β Test regular expressions with live match highlighting
- Timestamp Converter β Convert between Unix timestamps and human-readable dates
- Unit Converter β Convert length, weight, temperature, and more
- Calculator β Simple and scientific calculator
- Cron Expression Generator β Build cron schedules with a visual editor
- QR Code Generator β Generate QR codes for text, URLs, and more
- β 100% Client-Side β All processing happens in your browser. No server uploads, no privacy concerns.
- β‘ Instant & Free β No registration, no rate limits, no ads blocking content.
- π Multilingual β Available in 9 languages: English, δΈζ, ζ₯ζ¬θͺ, νκ΅μ΄, Deutsch, EspaΓ±ol, FranΓ§ais, PortuguΓͺs, Π ΡΡΡΠΊΠΈΠΉ.
- π± Responsive Design β Works seamlessly on desktop, tablet, and mobile.
- π URL Sharing β Share compressed data via URL hash for collaboration.
- Pure HTML/CSS/JavaScript β No frameworks, no build tools, no dependencies.
- Self-Contained β Each tool is a single HTML file with inlined styles and scripts.
- Static Hosting β Deployed on Cloudflare Pages for global performance.
This project is licensed under the MIT License β free to use, modify, and distribute. No attribution required.
Found a bug or have a feature request? Open an issue or submit a pull request at the main repo.
Made with β€οΈ for developers who value privacy and simplicity.