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JSON Validator

Validate JSON online by pasting raw JSON and checking whether it parses correctly in your browser.

To json validator, upload your file, let your browser process it locally, and download the result in a few clicks.

No signup needed
Local browser processing
Three simple steps
1

Paste JSON to validate

What happens to your file?

This tool processes files locally in your browser. Confiles does not upload or store your file, and you get the result right away without creating an account.

Supported formats

This tool works with Pasted JSON.

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Core tools

If this page is not exactly the task you need, start with one of the core tools on the site.

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How to use

  1. 1.Paste your JSON text.
  2. 2.Validate the content.
  3. 3.Review or download the normalized JSON.

FAQ

Can I use this for school or office files?

Yes. This tool is built for everyday tasks like checking whether JSON is valid without extra setup.

Does this change my original file?

No. The tool creates a new result for you to download, leaving your original file unchanged.

Do I need special software?

No. You can use the tool directly in your browser.