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Tools · Text · Diff checker

Diff checker

Compare two texts, entirely in your browser.

Drop a file here, or choose one.

Runs fully in your browser. Nothing is uploaded.

How it works

  1. Paste the original text.

  2. Paste the changed version.

  3. Read the highlighted difference.

Frequently asked questions

No. Both texts are compared entirely in your browser.

Line mode is better for comparing whole documents, config files, or code - anything where you care which lines changed. Word mode is better for comparing a paragraph or a sentence, where you want to see exactly which words changed inside a line that's mostly the same.

Each field works best under 200,000 characters. Longer text is accepted, but comparison pauses above that so the tool never freezes your tab.

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