Beautify, minify, and validate JSON
Paste JSON and format it here. One job, in your browser—nothing is uploaded.
- Beautify · Minify · Validate
- Runs in your browser
- Nothing uploaded
- No account
Paste JSON, then beautify or validate.
What this tool does
Paste a JSON string, then beautify it with 2-space indents, minify it for payloads, or check whether it parses. Parsing uses the browser’s built-in JSON.parse, so the result matches what JavaScript will accept.
Related tools
FAQ
Does this JSON formatter send my data to a server?
No. Formatting, minifying, and validation run in your browser with JavaScript. The JSON never leaves this page.
What makes JSON invalid?
Common issues are trailing commas, single quotes, unquoted keys, comments, and truncated strings. This tool reports the parser error so you can fix the exact spot.
Can I minify JSON as well as pretty-print it?
Yes. Beautify adds indentation. Minify removes extra whitespace. Both require the input to be valid JSON.
Is this the same as a JSON validator?
Validation is included. If parse fails, you get the error message instead of formatted output. If parse succeeds, the JSON is valid.
Do I need an account?
No account, no upload, no install. Paste JSON and format it.