How to use JSON Formatter
- Paste raw or minified JSON into the box.
- Click "Format & validate".
- Valid JSON is reformatted with clean indentation; invalid JSON shows a clear error.
- Click "Copy output" to copy the result.
Key benefits
- Clear, specific error messages instead of a generic failure.
- Two-space indentation for readable, diff-friendly JSON.
- Runs locally — your data isn't sent to a server.
- One-click copy of the formatted result.
Privacy
JSON Formatter runs entirely in your browser using local JavaScript. Your files and text are processed on your own device and are never uploaded to QuickTiny's servers.
Frequently asked questions
Is my JSON data uploaded anywhere?
No. Parsing and formatting happen entirely in your browser using the native JSON parser.
What does the error message tell me?
It's the browser's native JSON parse error, which typically includes the type of problem (like an unexpected token) to help you locate the issue.
Can I minify JSON with this tool?
This tool focuses on formatting and validating. For minifying, remove the indentation manually or use JSON.stringify without a spacing argument in your own code.