JSON Validator

Validate JSON syntax and check for errors with helpful messages.

JSON Validator

Validate JSON syntax and check for errors with helpful messages and auto-fix

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The JSON Validator checks whether your JSON is correct and points out errors. Paste your data to confirm the syntax is valid, with clear messages that help you find and fix problems.

How to validate JSON

  1. Paste your JSON into the box.
  2. Run the validation.
  3. See if it is valid or where the error is.
  4. Fix the issue and check again.

Why validate JSON

A single missing comma or bracket can break JSON and cause an app to fail. Validating before you use the data saves time, since you catch the mistake early instead of hunting for it in your code later.

Clear error messages

The tool tells you what is wrong and roughly where, so you do not have to scan the whole file by eye. This is a big help with long data, where a tiny error can be hard to spot.

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