JSON validator
Check whether your JSON is valid and see where an error is.
🔒 Everything runs in your browser. Nothing you choose or type is uploaded. How to verify
How to use it
- Paste your JSON.
- Keep Validate only selected.
- Select Run and read the result.
Handy for
Checking API payloads and configuration files.
Good to know
The error message names the position where parsing stopped, which is often just after the real mistake.
Privacy: where the work happens
Everything you enter or choose is processed by JavaScript in your browser and never sent anywhere. Only the page code, and any library this tool needs, is downloaded from cdnjs or jsDelivr.
Questions
What are common JSON mistakes?
Trailing commas, single quotes, unquoted keys and comments are not allowed in JSON.
Does it fix errors?
No. It points to the problem so you can correct it.