What types of errors does the validator detect?

Our validator detects all JSON syntax errors including: missing or extra commas, unmatched brackets/braces, invalid escape sequences, unquoted keys, trailing commas, single-quoted strings, and more.

Does it show the exact error location?

Yes! The validator shows the exact line number and character position where the error occurs, along with a human-readable description of what went wrong.

Can it validate against a JSON Schema?

This tool validates JSON syntax. For schema validation, use our JSON Schema Generator to create a schema, then validate your data against it.

Is validation done on the server?

No. All validation is performed in your browser using JavaScript's native JSON.parse(). Your data never leaves your device.

JSON Validator

JSON & Data

Validate JSON with precise error locations

100% client-side processing

Ctrl+Enter to process

Input

Output

Output will appear here...

How to Use JSON Validator Online

Paste your data into the input field above
The result appears instantly in the output area
Click "Copy" to copy the result to your clipboard

Validate JSON with precise error locations. Runs 100% client-side — no data is sent to any server.

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Frequently Asked Questions

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