Free browser tool
JSON Formatter
Format, validate, and minify JSON text in your browser with clear error messages.
Updated 2026-05-09
How to use this tool
- Paste or type your input into the tool.
- Choose the action or option that matches your task.
- Review the output before copying it into another app.
Notes
Paste JSON to format it with indentation, minify it, or find syntax errors.
Inputs are processed in the browser for this static MVP. Avoid pasting secrets into any online tool unless you understand the environment.
FAQ
Does this JSON formatter upload my data?
No. Formatting runs locally in your browser in this static version.
Can it fix invalid JSON automatically?
It reports parse errors, but it does not guess missing commas or quotes because that can change meaning.
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