Developer Tools
Code BeautifierFormat and pretty-print minified or messy HTML, CSS, and JavaScript, right in your browser.JSON to CSVConvert a JSON array of objects into CSV, right in your browser.UUID GeneratorGenerate random UUID v4 identifiers instantly, right in your browser.JSON FormatterFormat, validate and minify JSON instantly, right in your browser.Base64 EncoderEncode text to Base64 instantly, right in your browser.Base64 DecoderDecode Base64 back to readable text instantly, right in your browser.URL EncoderPercent-encode text for safe use in URLs, instantly in your browser.URL DecoderDecode percent-encoded URLs back to readable text, instantly in your browser.JWT DecoderPaste a JWT (JSON Web Token) and instantly see its decoded header, payload, and raw signature — entirely in your browser.Regex TesterTest regular expressions against a block of text and see every match, capture group, and index highlighted live.Number Base ConverterConvert integers between binary, octal, decimal, and hexadecimal live as you type, with full precision for very large numbers.Cron Expression ParserType a standard 5-field cron expression and instantly get a plain-English description of its schedule, plus validation that catches malformed syntax.Fake Data GeneratorGenerate realistic-looking fake names, addresses, emails, and other test data — locale-aware, exportable as JSON or CSV, entirely in your browser.YAML ↔ JSON ConverterConvert between YAML and JSON instantly, right in your browser. Paste either format and get a live, validated conversion with copy and download.Base32 Encoder/DecoderConvert text to and from Base32 (RFC 4648) instantly, right in your browser — nothing ever leaves your device.CSV to JSON ConverterConvert CSV data into a JSON array of objects, right in your browser.IP Subnet CalculatorCalculate the network address, broadcast address, subnet mask, wildcard mask, and usable host range from an IPv4 address and CIDR prefix or subnet mask, live in your browser.HTML Entity Encoder/DecoderConvert text to and from HTML entities like &, <, and é instantly, right in your browser — nothing ever leaves your device.JSON Diff CheckerCompare two JSON documents and see exactly what was added, removed, or changed — ignoring key order and formatting differences.Roman Numeral ConverterConvert numbers to Roman numerals and Roman numerals back to numbers, live as you type, for any value from 1 to 3999.GPS Coordinate ConverterConvert GPS coordinates between Decimal Degrees (DD) and Degrees/Minutes/Seconds (DMS) instantly, with latitude and longitude range validation.HTTP Status Code LookupSearch every standard HTTP status code by number or name and read what it actually means — from 100 Continue all the way to 511 Network Authentication Required.User Agent ParserPaste any User-Agent string and see the browser, operating system and device type it reports — parsed instantly in your browser.