What this tool does
JSON Validator uses the browser's native JSON.parse to check the complete input and does not automatically repair, rearrange or modify the data. Success and failure are clearly stated with words and symbols, rather than relying solely on color.
- "✓ Valid JSON" means that the entire document can be read by standard parsers.
- "× Invalid JSON" comes with raw parsing errors and reliably computed positions.
- Provide two sets of examples, legal and illegal, for easy comparison.
How to use it
- Paste the JSON to be validated.
- Click "Validate JSON".
- Read Valid JSON or Invalid JSON status.
- If it is invalid, modify the original content according to the cause and location of the error and verify again.
Common uses
- Quickly check the syntax before submitting the configuration file.
- Locate bracket or comma errors in interface test data.
- Verify that the text provided by the third party is indeed standard JSON.
JSON Validator Features
Validates JSON syntax and displays valid status, specific cause, and calculable error location. It is suitable for daily development, debugging, data sorting and code optimization scenarios. The processing results can be directly viewed, copied or downloaded.
FAQ
Will the validator automatically fix JSON?
No. The verification page deliberately retains the original text and only reports validity and errors to avoid changing data without consent.
Why are single quotes invalid?
JSON object keys and strings must use double quotes. Single quotes are JavaScript writing and not standard JSON.
Is empty content considered valid JSON?
Doesn’t count. Valid JSON must contain a complete value, such as an object, array, string, number, boolean, or null.