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Side-by-Side Diff

Compare two texts displayed side by side, line by line (LCS algorithm).

Compare text side by side in two columns, making it easy to spot differences between the left and right versions — just like on GitHub.

How to use Side-by-Side Diff

  1. Paste content into both columns.
  2. Review the color-coded differences.

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🔒 Side-by-Side Diff runs entirely in your browser — the data you enter is not sent to any server. Free, no sign-up required. See145 free dev tools more.