JSON Validator
Check whether your JSON is valid and get a clear, human-readable error message with line and column information when it isn't.
Validation results will appear here.
How to Use
- 1Paste your JSON into the input box.
- 2Validation runs automatically as you type.
- 3If invalid, review the line and column referenced in the error.
Features
- Instant validation as you type
- Line and column error information
- Clear, actionable error hints
- Copy input for reuse
Example
Click Load Example to see a valid JSON object, then try removing a comma to see how errors are reported.
About This Tool
A JSON validator checks whether a piece of text conforms to the JSON specification. Unlike a formatter, it does not change your text; it only tells you whether the syntax is correct and, if not, where the problem is.
This is useful when debugging API payloads, configuration files, or hand-written JSON where a single missing comma or unescaped quote can break parsing.
FAQ
- What counts as valid JSON?
- Text that can be parsed by the standard JSON.parse algorithm: double-quoted keys, no trailing commas, and properly closed brackets and braces.
- Does this tool fix invalid JSON automatically?
- No, it only reports where the syntax is broken. Use the JSON Formatter tool once your JSON is valid.