JSON Validator
Check JSON syntax instantly, identify parsing errors and view valid JSON in a readable format.
What Is JSON Validation?
JSON validation is the process of checking whether a piece of text follows the syntax required by the JSON data format. A valid JSON document can be parsed by a JSON parser, while invalid JSON contains one or more syntax problems.
How to Validate JSON
- Paste your JSON into the input area.
- Select Validate JSON.
- If the JSON is valid, the tool will show a success message.
- If the JSON is invalid, the tool will show the browser parser's error message.
- Use Format JSON to make valid JSON easier to read.
Common JSON Errors
Missing Double Quotes
JSON property names and string values normally need double quotation marks. Using unquoted text can make the document invalid.
Trailing Commas
JSON does not allow an extra comma after the final property of an object or the final item of an array.
Missing Brackets
Every opening object or array delimiter must be matched by its corresponding closing delimiter.
Is My JSON Uploaded?
Validation and formatting are performed directly in the browser using its built-in JSON parser. The tool does not need to upload the entered JSON to a remote validation server.
JSON Validator FAQ
Common questions about JSON validation.
It checks whether the entered text can be successfully parsed according to JSON syntax.
The tool shows the parsing error returned by the browser so you can investigate the problem.
Yes. Once valid JSON is detected, you can format it into a readable indented structure.
Yes. The tool is free to use.