JSON Formatter
Format, validate, and beautify JSON instantly.
How to use JSON Formatter
Paste your JSON and click Format. Valid JSON is beautified with clean indentation; invalid JSON shows a clear error message.
Use Minify to compress JSON to a single line for production use.
Features
- Format and beautify JSON
- Validate with error messages
- Minify option
- Runs in your browser — data stays private
Frequently Asked Questions
Is my JSON sent to a server?+
No. Formatting and validation happen entirely in your browser.
What if my JSON is invalid?+
You will see an error message describing the problem.
Is there a size limit?+
Very large files may slow your browser, but there is no hard limit.