GlobalFree to use

JSON formatter & validator

Validate, pretty-print or minify JSON locally. Invalid data is never sent to a server.

Your inputs stay in this tab. We do not receive your files, pasted text or calculation values.

Input

Your result

Your result will appear here.

How to use this tool

  1. Enter your values or choose a local file. Replace the example data with your own.
  2. Review options, units and assumptions, then run the tool.
  3. Check the result before copying or downloading it. Keep an original copy of important files.

Method & assumptions

Validate, pretty-print or minify JSON locally. Invalid data is never sent to a server.

JSON.parse → JSON.stringify

Worked example

{"a":1}

Limits & important notes

Output depends on your input and browser support. Keep the original. Large files may exceed your device’s memory.

Content updated:

Privacy & Free to use

Are my inputs stored?

Your inputs stay in this tab. We do not receive your files, pasted text or calculation values.

Is this tool free?

Yes. No signup or payment is required.

Processed in your browser

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