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Diff Checker

Compare two versions of text side by side and see exactly which lines were added, removed, or unchanged.

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Guide

Usage, privacy, and related tools

Best for

  • Code review outside an IDE
  • Document version comparison
  • Config and log change inspection

Privacy

Text comparison runs locally. Neither version of your text is sent to a server.

Quick tips

  • Green lines were added in the modified version.
  • Red lines were removed from the original.
  • Line numbers on the left correspond to the original; on the right to the modified text.

How to use this tool

  1. Paste the original text on the left.
  2. Paste the modified text on the right.
  3. Click Compare and review the highlighted diff output.

Common questions

Is there a line limit?

The tool supports up to 2,000 lines per side for performance reasons.

Does it compare character by character?

The current view compares line by line. Lines are shown as added or removed in full.

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