JSON Validator

JSON

Check whether your JSON is valid. If it is not, you get the precise line and column of the error and the text around it.

No uploadInstant & freeWorks offline

Input — paste, type or drop a .json file

Result

Paste JSON to check it.

How to use the JSON Validator

Are my files uploaded anywhere?

No. Everything runs inside your browser on your own device. Nothing is sent to a server, so it works even offline once the page has loaded.

What are the most common JSON errors?

Trailing commas, single quotes instead of double quotes, unquoted keys, and comments. None of these are allowed in standard JSON.