About This Tool

This tool checks whether a block of text is syntactically valid JSON and, if it isn't, reports the exact line and column where the problem is — faster than hunting through a large payload by eye.

How to Use

1. 1Paste your JSON into the box.
2. 2Validation runs automatically as you type.
3. 3If it's invalid, check the error message for the exact line and column to fix.