JSON formatter and validator
Paste messy JSON and get clean, readable output in one click. Pretty-print with your preferred indentation, minify it for compact transfer, and instantly see the exact error when something is invalid. Runs entirely in your browser — API responses and config files never leave your device.
How to use
- Paste your JSON into the input box.
- Choose an indentation: 2 spaces, 4 spaces or tab.
- Press "Format" for pretty output or "Minify" for compact.
- Read the exact error message if something is invalid.
- Click "Copy" to take the result to your clipboard.
Why use Outilverse?
A formatter that respects privacy: API payloads, tokens and config files stay in your browser while parsing runs locally. Errors point to the exact character, so debugging is fast.
FAQ
Is my JSON uploaded anywhere?
No. Parsing and formatting run in your browser — nothing is transmitted or stored.
What is the difference between Format and Minify?
Format adds indentation and line breaks for readability; Minify removes all whitespace for the smallest possible size.
Can it tell me where my JSON is broken?
Yes — when parsing fails, the tool shows the parser's exact error message so you can fix the spot quickly.