JSON Validator
Validate JSON syntax and structure instantly online.
Part of Yoopla's 445+ free browser tools.
How to Use JSON Validator
- 1
Paste your JSON into the input box.
- 2
Click "Validate" to check for syntax errors.
- 3
Errors are highlighted with line and column information.
- 4
Fix the errors and re-validate until it passes.
Frequently Asked Questions
What does JSON validation do?▾
It checks whether your JSON string conforms to the JSON specification (RFC 8259).
Can it validate JSON Schema?▾
Currently the tool validates JSON syntax. Schema validation is on the roadmap.
Why is my JSON invalid?▾
Common causes: trailing commas, single quotes, unescaped special chars, or missing braces.
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