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A LITTLE LESS BUSYWORK

Text Diff Checker - Compare Text and Code Online

See what changed between two versions without scanning them line by line yourself. Paste the original and updated text, compare, and inspect the highlighted differences.

Free to use / Runs on your device / No account needed

Line-by-line comparison, not plagiarism detection or semantic analysis. Text stays in this tab and is cleared on reload. Compare up to 100,000 characters per side; large line-pair comparisons are limited to keep your browser responsive.

How to use it

  1. Paste the original text and its updated version.
  2. Compare the texts to see added, removed, and unchanged lines.
  3. Review or download the plain-text comparison. Clear both editors when finished.

A few useful answers

Does this detect plagiarism or equivalent code?

No. It compares lines exactly, including spaces and letter case. It does not interpret meaning, execute code, or detect paraphrasing.

Why is there a comparison limit?

Each side supports up to 100,000 characters and 3,000 lines, with at most 2 million line pairs. These limits keep the browser responsive. Compare smaller sections for very large documents.

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