About this tool
The JSON Formatter cleans up messy JSON into readable, indented form and validates it at the same time, pinpointing syntax errors with a clear message. You can also minify JSON to the smallest possible size for production. It is an everyday essential for developers working with APIs, config files and data exchange — all processed locally in your browser.
How to use
- 1Paste your JSON into the input.
- 2Click Format to beautify or Minify to compress.
- 3Fix any errors highlighted, then copy the result.
Benefits
- Formats and validates in one step.
- Clear, human-readable error messages.
- Choose indentation and minify mode.
Frequently asked questions
Does it validate JSON too?+
Yes. If your JSON is invalid, the tool shows exactly what and where the problem is.
Is my data safe?+
Completely. JSON is parsed in your browser and never sent to a server.