Dokdoin - Convenient & Safe Web Tools

Text Diff Checker

The Text Diff tool instantly compares the source code of the original and modified documents line by line, providing a highly readable visual display of newly added parts (green highlights) and removed/modified sentences (red highlights).

Comparison Result History
Enter two texts to compare at the top, then click the 'Compare Texts' button.

How to Use the Text Diff Tool and Algorithm Features

The Text Diff tool instantly compares the source code of the original and modified documents line by line, providing a highly readable visual display of newly added parts (green highlights) and removed/modified sentences (red highlights).

Key Features

  • Real-time line-by-line matching: Instantly separates differences even in long documents using an ultra-fast line comparison algorithm.
  • Privacy guarantee: The original texts analyzed and compared are computed in an isolated execution area with no external leaks, allowing safe comparison of highly confidential documents or core source code files.
  • Highly readable highlights: Deleted lines are intuitively expressed with red minus (-) signs and backgrounds, while added lines use green plus (+) signs and backgrounds.

How to Use

  1. Paste the existing sentences into the 'Original Text' area on the left.
  2. Enter the latest processed sentences into the 'Modified Text' area on the right.
  3. Click the 'Compare' button to render the highlighted difference details along with line numbers in the result pane below.
  4. Click the 'Reset' button to start a new comparison task anytime.

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