How json validator works
Uses the browser’s strict JSON parser. Comments, trailing commas and single-quoted keys are rejected.
Try an example
{"ready":true} is valid; {ready:true} is invalid.
Good to know
Input stays in this tab and is never sent to analytics. Limit 100,000 characters. No input is executed.
Your privacy
Processing happens on this device. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.