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MODE

Text Diff Checker

Paste an original and a changed version to see exactly what differs.

How the Text Diff Checker works

The comparison uses the longest common subsequence method, the same idea behind version control diffs, so the result shows the smallest set of changes. Choose line mode for a classic side by side review, word mode for inline edits in prose, or character mode for tiny changes.

Ignore case and ignore extra whitespace remove noise when only the wording matters. Each side can hold up to 4000 lines, words or characters for an exact comparison, which covers most documents when you compare by line.

When it is useful

  • •Seeing what an editor changed in your draft.
  • •Comparing two versions of a config file or a contract.
  • •Checking whether two exports are really identical.
  • •Reviewing changes to copy before it is published.

Frequently Asked Questions

What do the colors mean?

Green marks text that appears only in the changed version, and red marks text that was removed from the original.

Which mode should I choose?

Lines for code, lists and structured text. Words for essays and emails. Characters for spotting a single typo.

Is there a size limit?

Exact comparison works up to 4000 units per side. For longer text compare by lines.

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