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MediaToolsSuite

JSON Validator

Paste your JSON below and validate it with detailed errors.

Validate JSON instantly — free and private

Paste JSON to check it for syntax errors in seconds. This free JSON validator pinpoints the exact line and column of any problem, so you can fix malformed data fast. Validation runs entirely in your browser — your data is never sent to a server.

How to validate JSON

  1. Paste your JSON into the editor above.
  2. Validation runs automatically as you type.
  3. Read the error location to find problems fast.
  4. Copy the result once it is valid.

JSON validator FAQ

Is the JSON validator free?

Yes — free and unlimited, with no account required.

Is my JSON data uploaded?

No. Validation happens locally in your browser; your data never leaves your device.

What errors does it catch?

Syntax errors like missing commas, unbalanced brackets, and invalid tokens — with line and column numbers.

Related: JSON Formatter | Browse all tools

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