JSON Formatter & Validator

This free JSON formatter lets you paste raw or minified JSON and instantly turn it into clean, indented, human-readable output. It validates as it formats: if your input contains a syntax error — a trailing comma, a missing quote, an unescaped character — the tool pinpoints the exact position so you can fix it in seconds instead of hunting through a wall of text.

Use it when you are debugging API responses, inspecting configuration files, preparing payloads for documentation, or shrinking JSON with the one-click minifier before shipping it over the network. You can switch between 2-space and 4-space indentation, sort object keys alphabetically for stable diffs, and copy or download the result instantly.

Everything happens locally in your browser using the native JSON parser — your data is never uploaded to any server, which makes it safe for tokens, customer records and other sensitive payloads. No sign-up, no limits, no tracking of your input.