DEVELOPER / FREE ONLINE TOOL
JSON Formatter & Validator
Validate, indent, or minify a JSON document.
Free to use On-device processing No account needed
Your workspace Runs privately in your browser
Your result
A little guidance.
Parse JSON and format it with two-space indentation, four-space indentation, or no extra whitespace. Invalid JSON reports a parsing error. JavaScript number precision applies.
How it works
- Enter your values, or use the example to get started.
- Select “Format JSON” to process your input in your browser.
- Review the result, then copy or download it when available.
Good to know.
Can large integers lose precision?
Yes. JSON numbers are parsed as JavaScript numbers. Keep large identifiers as quoted strings. Duplicate object keys resolve to the last value.
Is my input sent to a server?
No. This tool runs in your browser. KILIZU does not upload or store the values or files you enter here.