JSON Diff
Paste two JSON documents and see a structural diff between them. Output is a multiline list of changes keyed by JSON Pointer paths (RFC 6901 style) — added fields are prefixed with `+`, removed with `-` and changed with `~`. Useful for spotting drift between API responses, config files or test fixtures. Runs entirely in your browser — no uploads, free, online.
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Type
Diff
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Frequently asked
Is JSON Diff free to use?
Yes. JSON Diff is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — JSON Diff runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does JSON Diff work?
Open JSON Diff, paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.
Which browsers does JSON Diff support?
Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. JSON Diff uses standard web APIs and does not require any plugin, extension, or sign-up.