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Diff Checker

Compare texts

Paste original and revised text to see a clear line diff. Nothing is uploaded.

Runs in your browser. Inputs stay on this device — nothing is uploaded to BrowserSpaces for processing.

Line diff

LCS-based additions and deletions.

Side-by-side

Original vs revised view.

Stats

Counts of added/removed lines.

Private

Texts stay in memory.

Use the tool

+2 / −1 lines
one
− two
+ two changed
three
+ four

How it works

Local LCS diff

A classic longest-common-subsequence pass marks lines as equal, added, or removed.

Three steps

  1. 1

    Paste both sides

    Original and revised.

  2. 2

    Diff

    Review colored changes.

  3. 3

    Copy

    Export a unified summary.