Why use this formatter?
- Pretty-print with custom indent or minify for compact payloads.
- Live validation while you type with clear line/column pointers.
- Copy formatted JSON with one click; no uploads or tracking.
- Works well for logs, config files, and quick API experiments.
Validate fast
Format and debug JSON
Paste JSON, pick an indent, and format or minify. Errors are highlighted automatically with a caret under the position.
Parsing runs locally. Empty input stays empty without errors.
Preview
Frequently asked questions
Will my JSON be uploaded?
No. Parsing, formatting, and error highlighting happen only in your browser, so sample payloads stay on your device.
How are errors highlighted?
When parsing fails, the tool shows the line and column plus a caret under the exact position so you can fix it quickly.