Developer tool

JSON Formatter

Format compact JSON with indentation and clear parse feedback, directly in your browser.

Free browser tool

No Matrix computer needed

✓ No account or card

✓ Use the result right away

✓ Task-specific limits below

Workspace

Use json formatter

Runs in this browser tab

Your input34 / 100,000

Result

Your result will appear here. The input stays in this browser tab.

How to use it

Paste JSON, then format it into readable, indented data you can copy into a file or review.

Try this example

{"project":"matrix","active":true}

What to check

Formatting does not repair malformed JSON or preserve comments and duplicate object keys.

Review the result before using it in a published page, application, or agent configuration.

Quick answers

Frequently asked questions

Will the JSON formatter fix an invalid document?

It formats JSON that already parses. If the input has a syntax error, correct the JSON first; formatting cannot infer missing commas or quotes.

Does JSON formatting preserve comments and duplicate keys?

No. JSON does not include comments, and parsing can collapse duplicate object keys. Review the result before replacing a configuration file.

Keep exploring

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