What is Raw JSON?
The single-line, machine-written JSON from API logs, config dumps and minified bundles — valid, but nearly impossible to read or diff by eye.
JSON Formatter
Format, minify and validate JSON instantly — 0, 2 or 4 space indent.
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How to format JSON
Paste your JSON
Paste the text or drop a .json file — it stays on your device.
Choose indentation
Pick 2 or 4 spaces to pretty-print, or 0 to minify.
Copy or download
Grab the formatted JSON or save it as a .json file.
Frequently asked questions
How do I format JSON?
Paste your JSON into the text area or load a .json file, pick an indent of 0, 2 or 4 spaces, and the formatted result appears immediately.
What happens with invalid JSON?
The parser reports the error instead of guessing. JSON5, trailing commas, single quotes and comments are all rejected because they are not valid JSON.
Can I minify JSON too?
Yes. Choosing 0 indentation removes all insignificant whitespace, producing compact JSON ideal for storage or API payloads.
Is my JSON sent to a server?
No. Parsing and re-serializing happen entirely in your browser — nothing is uploaded, logged or stored.
Strict JSON formatting
Here is what each format is for, and when converting messy JSON into readable form is the right move.
What is Formatted JSON?
The same data re-serialized with consistent indentation and key order preserved, ready to read, edit, review in a diff or commit to a repo.
When you need it
Use it to inspect API responses, tidy config files before editing, and produce readable diffs. It is a strict validator: if your source uses comments or trailing commas, fix those first — the tool will not silently rewrite invalid JSON.