100% private. Your JSON is parsed and formatted entirely in your browser — nothing is uploaded, stored, or sent anywhere.
Developer / Code
Format or validate JSON
Paste JSON below, then pretty-print it, minify it, or check that it is valid.
Output
Your formatted or validated JSON will appear here.
Result
- Status
- —
- Size
- —
- Top-level type
- —
Questions people ask
Is my JSON data sent to a server?
No. Parsing and formatting happen entirely in your browser with the built-in JSON parser. Your data never leaves your device.
What does the validator check?
It checks strict JSON syntax — quoted keys, no trailing commas, no comments — and reports the exact position of the first error it finds.
What is the difference between Format and Minify?
Format pretty-prints JSON with 2-space indentation for readability. Minify removes all unnecessary whitespace for the smallest possible size.