Toolwinder
🧩

JSON Formatter

Beautify, minify, validate, and explore JSON with a tree viewer. Runs completely in your browser.

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About This Tool

Beautifies, minifies, and validates JSON, with a collapsible tree view for digging through deeply nested objects. Parse errors are flagged inline with the reason, so tracking down a stray comma doesn't mean scanning the whole file by eye.

Frequently Asked Questions

Is my JSON data uploaded anywhere?+
No. Formatting, validation, and the tree view all run entirely in your browser. Your JSON never leaves your device.
What happens if my JSON is invalid?+
The tool highlights the parse error inline, including the reason (e.g. unexpected token) so you can quickly locate and fix the issue.
Can I switch between compact and readable formatting?+
Yes. Use Beautify to pretty-print with 2 spaces, 4 spaces, or tabs, or Minify to collapse everything to a single line.

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