How to Validate JSON
Check if your JSON is correctly structured and find the exact line and column of any syntax errors.
Tool Used
JSON Validator
Open the JSON Validator
Navigate to /tools/json/json-validator.
Paste your JSON
Paste the JSON you want to check into the input textarea. It can come from an API response, a config file, a log entry, or anything else.
Read the validation result
If the JSON is valid, you will see a green confirmation badge. If it is invalid, a red message shows the exact line and column where the parser failed, along with a description of what went wrong.
Fix the highlighted error
Common problems include missing commas between fields, unmatched braces or brackets, single quotes used instead of double quotes, trailing commas after the last item in an array or object, and unescaped backslashes inside strings. Fix the spot highlighted by the validator.
Re-validate after each change
Each time you edit the input, the validator re-runs automatically. Repeat the fix and re-check loop until the green Valid badge appears, then your JSON is safe to use anywhere it is required.
All done!
You are ready to use JSON Validator like a pro.