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About JSONLint?

JSONLint is a validator and reformatter for JSON, a lightweight data-interchange format. Copy and paste, directly type, or input a URL in the editor above and let JSONLint tidy and validate your messy JSON code.

Tips & Tricks

Common Errors

Different Results

If you use a Windows computer you may end up with different results. This is possibly due to the way Windows handles newlines. Essentially, if you have just newline characters (\n) in your JSON and paste it into JSONLint from a Windows computer, it may validate it as valid erroneously since Windows may need a carriage return (\r) as well to detect newlines properly. As a solution, either use direct URL input, or make sure your content's newlines match the architecture your system expects!


Maintained by Andrey Gubanov. Thanks to Douglas Crockford of JSON and JS Lint, and Zach Carter, who built a pure JavaScript implementation. You can download the JSONLint source code on GitHub.