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Diff checker — offline

Spot every change between two texts without either of them leaving your browser.

100% private — files never leave your device
Original
Changed

How it works

  1. 1

    Paste the original text on the left, the changed text on the right.

  2. 2

    Pick line or word granularity.

  3. 3

    Read the combined diff: green added, red removed.

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Frequently asked questions

Are the texts I compare uploaded?

No — the diff is computed by an open-source library running in your browser. Contracts, configs, and code stay on your machine.

Line or word mode — which should I use?

Line mode for code and configs; word mode for prose, where it pinpoints changed words inside otherwise identical sentences.

How are changes shown?

Additions are green, deletions are red with strikethrough, unchanged text stays plain — all in one combined view.