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Developer Tool

JSON Formatter

Format, validate, minify, and compare JSON without sending your data to a server.

Privacy-first: this tool runs in your browser without paid APIs or third-party calculation calls.

JSON workspace

Format and validate JSON

JSON A

JSON B

Output

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How to use

Paste JSON into editor A for single-document actions.
Use editor B when you want to compare two JSON objects.
Run validate, beautify, minify, or compare and copy the output.

FAQs

Is my JSON uploaded?

No. Parsing and formatting happen locally in your browser.

Can I compare two JSON files?

Yes. Paste each JSON into A and B, then click Compare.

What if JSON is invalid?

You will see a clear error message with the parser detail.

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