JSON Formatter
Format, beautify and validate JSON instantly in your browser. Free online JSON formatter with 2/4-space and tab indentation, no signup, 100% client-side.
Developer tools
Formatters, encoders, generators and decoders for everyday development work.
Choose a tool
JSON Minifier
Minify JSON online by removing all whitespace and line breaks. Free, instant, and 100% client-side; see the size saving immediately.
JSON to CSV Converter
Convert a JSON array to CSV online in one click. Handles nested values, quotes and custom delimiters, free and 100% client-side.
CSV to JSON Converter
Convert CSV to a JSON array of objects online. Supports quoted fields, custom delimiters and header rows, free, instant, 100% in your browser.
XML Formatter
Format and validate XML online with proper indentation. Free XML beautifier and minifier that runs 100% in your browser, with no upload needed.
Base64 Encode / Decode
Free online Base64 encoder and decoder. Unicode-safe, supports URL-safe Base64, and runs 100% in your browser. Nothing is ever uploaded.
URL Encode / Decode
URL-encode or decode text online (percent encoding). Choose between encoding a full URL or a query component, free and 100% client-side.
UUID Generator
Free UUID v4 generator. Create one or hundreds of cryptographically random IDs at once, with uppercase and no-dash options. Runs in your browser.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text online. Instant, free, and 100% client-side; your input never leaves your browser.
JWT Decoder
Free JWT decoder and debugger. Inspect a token's header, payload and expiry, 100% in your browser, so no token is ever uploaded.
Regex Tester
Test JavaScript regular expressions online with live match highlighting, capture groups and flags. Free, instant, 100% client-side.
Password Generator
Free strong random password generator with custom length and character sets. Cryptographically secure and generated 100% on your device.
Cron Expression Parser
Parse any cron expression into plain English and see the next run times. Free, instant and 100% client-side; schedules are checked in your browser.
Number Base Converter
Free online number base converter. Convert between binary, octal, decimal, hex and any base 2-36: exact for huge numbers, 100% in your browser.
JSON to YAML Converter
Free JSON to YAML converter for config, Kubernetes and CI files. Paste JSON and get clean, indented YAML instantly; 100% in your browser, nothing uploaded.
Which tool should I use?
JSON Formatter pretty-prints and validates JSON with readable indentation. JSON Minifier strips whitespace to produce the smallest possible payload for transfer.