JSON Formatter
Format messy JSON with clean indentation, and get a clear error if it's invalid.
Free No signup Runs in your browser — nothing uploaded
Result
How to use the JSON Formatter
- Paste your content, or load a file.
- The result appears as you type.
- Copy or download the output.
Frequently asked questions
- What if my JSON is invalid?
- You get the parser's message pointing at where it went wrong.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.