Validate pasted JSON
Catch syntax issues in API responses, schema snippets, app settings and structured data before sharing or publishing.
JSON Formatter
Format, minify and validate pasted JSON.
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Clean and validate API responses, config snippets and structured data by formatting or minifying JSON directly in your browser.
- JSON validation
- Pretty formatting
- Minified output
- Copy and download output
Make dense JSON readable
Beautify minified JSON with consistent spacing so nested objects, arrays and values are easier to inspect.
Prepare compact output
Minify formatted JSON when you need a smaller snippet for configs, test fixtures or quick handoff.
Private browser-based parsing
The formatter runs locally in your browser, so pasted JSON does not need to be uploaded to a server.
Frequently asked questions
It parses pasted JSON, reports syntax errors, formats valid JSON with readable indentation and can also minify it.
Yes. If the input cannot be parsed as JSON, the tool shows the browser parser error so you can fix the syntax.
Yes. You can format JSON using 2, 4 or 8 spaces depending on your preferred style.
No. The tool runs in your browser, so pasted JSON is processed locally on your device.