Paste your JSON, pick your options, go.
Drop in a .json file or paste raw JSON, choose your indentation and sorting, then format, minify, or just validate. Everything runs on your device — nothing is uploaded.
Drop a .json file here or tap to browse
Or paste your JSON directly below
CSV needs a flat array of objects at the top level; TypeScript and JS object work on any valid JSON.
Auto-fix strips comments and trailing commas and quotes bare keys. Unescape unwraps JSON that's been copied as an escaped string, e.g. "{\"a\":1}".
Four steps, clean JSON.
No manual required — here's the entire flow.
Add your JSON
Paste your JSON into the box or drop in a .json file. It loads straight into the input area.
Set your options
Choose an indent size and turn on Sort keys A→Z if you want every object's keys reordered alphabetically.
Format or minify
Tap Format JSON for a readable, color-coded layout, or Minify to collapse it to a single compact line.
Copy or download
Copy the result to your clipboard or download it as a .json file. Stats on size, keys, and depth are included.
Built for reading, not just printing.
The details that make debugging and cleaning up JSON faster, without ever leaving your browser.
Runs on your device
Parsing, formatting and minifying all happen locally in JavaScript. Your data never leaves your device.
Precise error detection
Invalid JSON gets pinpointed to the exact line and column, so you're not guessing where the syntax broke.
Advanced formatting
Choose 2 spaces, 4 spaces or tabs, sort keys alphabetically, and read color-coded, easy-to-scan output.
Questions people actually ask.
The short answers — with the long ones one tap away.
How do I format JSON with this tool?+
Paste your JSON into the box, or drop in a .json file. Pick your indent size and any options, then tap Format JSON. The pretty-printed, color-coded result appears on the right, ready to copy or download.
Is my JSON uploaded to a server?+
No. Formatting, validating and minifying all happen locally in your browser using JavaScript. Your data never leaves your device, so it's safe to use with private or sensitive JSON.
Can this tool find errors in invalid JSON?+
Yes. If your JSON can't be parsed, the tool reports what went wrong along with the exact line and column where the problem starts, so you can jump straight to the fix.
Can I minify JSON instead of formatting it?+
Yes. Tap Minify to collapse your JSON into a single compact line with no extra whitespace — useful for shrinking payloads before sending them over the network.
Can I sort the keys in my JSON object?+
Yes. Turn on Sort keys A→Z before formatting, and every object's keys are reordered alphabetically at every level — which makes diffing two JSON files much easier.
What indentation options are available?+
You can choose 2 spaces, 4 spaces, or a tab character for indentation. Minified output ignores this setting since it removes all whitespace.
Can this tool fix broken JSON automatically?+
Yes. Turning on Auto-fix common errors strips // and /* */ comments, removes trailing commas, quotes bare object keys, and converts single-quoted strings to double-quoted ones before validating — which resolves many of the small mistakes that break strict JSON.
Can I convert JSON to CSV, TypeScript, or a JS object?+
Yes. Pick CSV, TypeScript interface, or JS object under Output format before converting. CSV needs a flat array of objects at the top level; TypeScript and JS object work with any valid JSON structure.
Is this JSON formatter free to use?+
Yes, it's completely free with no account, no sign-up, and no limit on how many times you use it.