Compare two JSON documents semantically — added, removed and changed values with exact paths, independent of key order.
🔒 Files never leave your browser. Nothing is uploaded.
JSON Diff is a free, private text & code tool that runs entirely in your web browser. Semantic JSON comparison — structural diff that ignores key order and shows added/removed/changed paths. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for json diff, compare json, json compare, semantic diff. Like every HeroTool by Digital Heroes, JSON Diff is 100% free with no limits.
Yes — JSON Diff is completely free for everyone. No sign-up, no account and no usage limits.
No. JSON Diff runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.
Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.
No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.
Semantic JSON comparison — structural diff that ignores key order and shows added/removed/changed paths.