How to use JSON Compare
- Paste the JSON you need to compare into the input box.
- JSON Compare updates the output automatically as you type.
- Finish by choosing Copy to take the output with you.
About this tool
There is no server behind JSON Compare. JSON Compare validates and reshapes your JSON locally with no server round-trip.
Clear error positions help you find a stray comma or bracket quickly. It behaves the same on desktop and mobile, with nothing stored remotely.
Frequently asked questions
How do I use JSON Compare?
JSON Compare runs entirely on your device: add your input, and it compares it locally in real time.
Does JSON Compare cost anything?
No — JSON Compare is completely free, with no sign-up and no hidden limits.
Is my input private in JSON Compare?
Yes — your input never leaves your device; JSON Compare does all the work in your browser.
Can JSON Compare handle large or deeply nested JSON?
Yes. JSON Compare parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Does JSON Compare work offline?
Once the page has loaded, JSON Compare keeps working with no network connection.