JSON Formatter, JSON Validator & JSON Beautifier
JSON formatter, JSON validator, and JSON beautifier in one tool. Pretty-print, validate, and minify JSON in your browser.
How to use the JSON Formatter
- 1Paste your JSON into the input box.
- 2Pick Pretty (indent 2) or Minify.
- 3The formatted output appears instantly with syntax errors highlighted.
- 4Click Copy to grab the result.
What you can do with the JSON Formatter
Format (pretty-print) JSON online.
Indent and align JSON so it's easy to read and diff.
Minify JSON.
Strip whitespace to get the smallest valid JSON payload.
Validate JSON syntax.
Catch trailing commas, missing braces, and unescaped quotes instantly.
Format an API response.
Paste a raw API body to see the structure at a glance.
JSON Formatter FAQs
Is my JSON sent to a server?+
No. Parsing and formatting both run entirely in your browser.
What's the difference between pretty and minified JSON?+
Same data — pretty is indented for humans, minified strips whitespace for the wire. Pick by audience: developers vs. APIs.
Why does my JSON show an error?+
Common causes: trailing commas, single quotes instead of double, comments (not allowed), or missing brackets. The tool points to the position.
Does the formatter sort object keys?+
Not by default — order is preserved. If you need sorted keys for deterministic diffs, use the Sort option.
How big a payload can I paste?+
There's no hard cap, but browsers slow down past a few MB. For huge files, use a desktop editor.
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