JSON Formatter & Validator
Paste JSON; beautify, minify or spot errors. Runs entirely in your browser.
Your files are processed on your device, never uploaded.
How to use
- 1Paste your JSON text into the box.
- 2Use “Format” to make it readable and indented, or “Minify” to collapse it to one line.
- 3If the JSON is invalid, an explanation of the error is shown; fix it and try again.
- 4Use “Copy” to put the result on your clipboard.
Frequently asked questions
Is the JSON I enter stored?
No, JSON is processed entirely in your browser; no data is sent to a server.
How do I know if my JSON is invalid?
The tool shows a message with the parse error and its cause.
Can it handle large JSON files?
Yes, it can handle large files as long as your browser's memory allows.