Developer tool

JSON Validator

Check whether a JSON document parses and see the shape of its root value without uploading it.

Free browser tool

No Matrix computer needed

✓ No account or card

✓ Use the result right away

✓ Task-specific limits below

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Runs in this browser tab

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Result

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

How to use it

Paste a JSON document to confirm its syntax before adding it to a configuration or API request.

Try this example

{"tools":["chat","terminal"]}

What to check

This checks JSON syntax, not an application-specific schema or business rule.

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

Quick answers

Frequently asked questions

What does the JSON validator actually check?

It checks whether the text parses as JSON and identifies the root value type. It does not verify an API's required fields or business rules.

Can a valid JSON result still be wrong for my app?

Yes. A document can be syntactically valid while missing fields or using the wrong values. Validate against the receiving app's schema separately.

Keep exploring

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