JSON Formatter & Validator
Beautify, minify and validate JSON with clear error messages.
About the JSON Formatter & Validator
Paste raw JSON to pretty-print it with your choice of indentation, minify it to the smallest valid form, or validate it — errors report the exact position so you can find the stray comma fast. The tool also shows the size before and after.
Frequently asked questions
Why does my JSON fail to validate?
The usual culprits are trailing commas, single quotes instead of double quotes, and unquoted keys — all valid JavaScript but invalid JSON.
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