32 tools
Developer tools
Free online developer tools: JSON, XML, YAML, HTML, CSS and JavaScript formatters and converters, Base64 and URL encoders, hash and UUID generators, JWT decoder, cron generator, regex tester and more.
- JSON Formatter & ValidatorFormat, validate and minify JSON with clear error messages.
- Base64 Encoder / DecoderEncode text to Base64 or decode Base64 back to text, with full Unicode support.
- UUID GeneratorGenerate random version 4 UUIDs in bulk.
- JSON to CSVConvert a JSON array of objects into a CSV file for Excel or Google Sheets.
- CSV to JSONConvert CSV data into a JSON array, using the first row as keys.
- URL Encoder / DecoderPercent-encode text for URLs or decode encoded URLs.
- HTML Entity Encoder / DecoderEscape special characters as HTML entities or convert entities back to text.
- Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files.
- JWT DecoderDecode a JSON Web Token to inspect its header, payload and expiry.
- Regex TesterTest JavaScript regular expressions with live match highlighting and groups.
- SQL FormatterBeautify SQL queries for MySQL, PostgreSQL, SQLite and more.
- Markdown to HTMLConvert Markdown to clean HTML with a live preview.
- Unix Timestamp ConverterConvert Unix timestamps to dates and dates back to timestamps.
- Color ConverterConvert colours between HEX, RGB, HSL and CMYK with a live picker.
- CSS & HTML MinifierMinify CSS and HTML to reduce file size and speed up your site.
- Number Base ConverterConvert numbers between binary, octal, decimal and hexadecimal.
- JSON to XML ConverterConvert JSON into well-formed XML with attributes, repeated elements and proper escaping.
- XML to JSON ConverterConvert XML into clean JSON, with attributes, text and repeated elements handled for you.
- XML Formatter & ValidatorBeautify, minify and validate XML with clear error messages and line numbers.
- YAML to JSON ConverterConvert YAML files such as Docker Compose, Kubernetes or CI configs into JSON.
- JSON to YAML ConverterTurn JSON into readable YAML with your choice of indentation and quoting.
- HTML FormatterBeautify messy or minified HTML with clean indentation, or minify it for production.
- CSS FormatterBeautify minified CSS into readable rules, or minify stylesheets to save bytes.
- JavaScript FormatterBeautify minified or messy JavaScript with your preferred indentation and brace style.
- HTML to Markdown ConverterConvert HTML, web pages or rich text into clean Markdown with tables and code blocks.
- Cron Expression GeneratorBuild cron schedules visually, explain any expression in plain English and see the next run times.
- Chmod CalculatorCalculate Linux file permissions: tick boxes to get 755 or rwxr-xr-x and the chmod command.
- String Escape / UnescapeEscape or unescape text for JSON, JavaScript, HTML, XML, CSV, SQL and regular expressions.
- Random String GeneratorGenerate secure random strings, tokens and codes with the characters and length you choose.
- User Agent ParserSee your user agent and parse any user agent string into browser, OS, device and bot details.
- Screen Resolution CheckerWhat is my screen resolution? See your screen size, viewport, pixel ratio and display features.
- Markdown Table GeneratorCreate Markdown tables in a spreadsheet-like editor or from CSV, with column alignment and HTML output.