JSON Validator
Developer Tools
100% in-browser
Paste JSON to check if it is valid; invalid JSON shows the exact error.
How to use the JSON Validator
- 1 Paste your JSON.
- 2 If it is valid you get a confirmation and pretty-printed output.
- 3 If not, the parser error tells you what went wrong.
About the JSON Validator
A single misplaced comma or bracket breaks JSON. This validator parses your input with the browser’s native JSON engine and reports whether it is valid, showing the error message when it is not.
Valid JSON is also pretty-printed so you can read it. Nothing is uploaded.
Frequently asked questions
Does it show where the error is?
It shows the browser’s parser error, which usually points at the position of the problem.
Is this the same as the JSON Formatter?
The Formatter adds a collapsible tree view; this tool focuses on quick validation.
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