JSON validator
Check whether a JSON document has valid syntax.
Processed on your device. Your files are never uploaded. · Free · No signup
Three steps. That’s all.
Paste the JSON you want to check and run validation.
Adjust the options and review the result.
Copy or use the result directly.
A little more about this tool
Check whether a JSON document has valid syntax. Syntax validation does not confirm that data matches a schema or that its business meaning is correct.
Good to know
What should I know before using JSON validator?
Syntax validation does not confirm that data matches a schema or that its business meaning is correct.
Does my input leave my device?
No. This tool processes your input in your browser. It does not send your files or entered content to a conversion service.
Do I need an account or a subscription?
No account, payment or subscription is required. Device memory and browser capabilities may limit large operations.