Convert
JSON Validator
Validate JSON and get precise error locations.
Converts locally in your browser. Free, nothing is uploaded.
About this tool
Free json validator tool. Validate JSON and get precise error locations. No signup, nothing uploaded.
Frequently asked questions
Is my data sent to a server?
No. The conversion happens entirely inside your browser.
What formats are supported?
The formats named in the title; malformed input returns a clear error.
Can I paste large files?
Yes for reasonable sizes, limited by browser memory.
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