JSON formatter

How to use JSON formatter

1. Paste your text or choose a supported file. Supported inputs: JSON, TXT.
2. Review the settings, then start. Your content is processed in your browser and never uploaded.
3. Check the output and download it. Download before closing the tab; local results are not saved.

Useful to know

Validate JSON, format it with two-space indentation, or minify it. A lossless parser preserves large integer and decimal tokens rather than rounding through JavaScript numbers.

This checks JSON syntax. It does not validate your data against a business schema or repair malformed input silently.

Supported formats and limits

Up to 5 MB per file. One input per job. Outputs use JSON format. Busy queues may ask you to try again shortly.

Do I need an account?

No. Every tool works for guests. Your favorites and saved settings stay on this device and do not include file contents.