JSON Formatter — Beautify, Minify & Validate JSON

JSON is the lingua franca of modern APIs, config files and front-end state — but raw JSON from a network response or a log line is almost unreadable. Our JSON Formatter takes any valid JSON and turns it into a properly indented, easy-to-scan structure in a single click. Need the opposite? One click also minifies your JSON into the smallest possible single-line payload, ideal for embedding in URLs, environment variables, or production bundles where every byte counts.

The tool runs entirely in your browser. Your JSON never leaves your device — there is no upload, no server-side parsing and no logging. That makes it safe to use with sensitive payloads like API tokens, internal endpoints, customer data or proprietary schemas, even on company hardware.

When JSON is invalid, most tools just say "syntax error" and leave you guessing. Ours tells you exactly which line and column the parser choked on, surfacing the exact character that broke the document. That is usually enough to spot a trailing comma, a missing closing brace, an unquoted key or a single quote where there should be a double quote.

You can adjust the indent from 1 to 8 spaces to match your codebase conventions, copy the result to the clipboard, or download it as a .json file. The formatter handles deeply nested structures, large arrays, Unicode, escaped characters and numeric edge cases (scientific notation, negative zero, very large integers) the same way a strict JSON parser would.