Developer Tools · 100% Free
JSON Formatter & Validator
Unreadable JSON, meet readability. Paste minified or messy JSON to pretty-print it, validate it with precise error messages, or minify it for production.
How to Use the JSON Formatter
1
Paste your JSON into the input box (or load the sample).
2
Click Format to pretty-print, or Minify to compress.
3
Read any validation errors with exact positions.
4
Copy the clean output with one click.
Why Use Our JSON Formatter?
- Pretty-print & minify. Human-readable or production-compact — your call.
- Precise errors. Validation messages point to exactly what is wrong.
- Sample included. Try it instantly with built-in example data.
- Private. Your data never leaves the browser — safe for sensitive payloads.
JSON Formatter FAQs
Paste it above and click Format. Nested objects and arrays get clean 2-space indentation.
Click Format or Minify — if the JSON is invalid you get a precise error message instead of output.
Minifying strips all unnecessary whitespace, producing the smallest valid JSON for APIs and production use.
Common culprits: trailing commas, single quotes instead of double quotes, unquoted keys, or comments — all invalid in strict JSON.
Yes. Formatting happens entirely in your browser; nothing is uploaded to any server.
Typical API responses format instantly. Extremely large payloads may be slower on older devices.
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