Precisely compares every line, clearly showing additions, deletions, and modifications.
Green for additions, red for deletions, yellow for changes. Intuitive and easy to read.
Automatically counts added, removed, and changed lines for a quick overview.
Quickly swap original and modified text for reverse comparison.
All comparison happens locally in your browser. No text is ever uploaded to any server.
No registration, no limits. Free forever.
A deep dive into the core principles of diff algorithms, from Myers' algorithm to Longest Common Subsequence, revealing the technology behind text comparison.
AlgorithmsWhy every developer needs version control. Understand Git's fundamental concepts, workflows, and essential commands.
Beginner GuideHow top tech companies like Google and Microsoft conduct code reviews. Learn the most effective code review methods and culture.
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Practical GuidePaste the original and revised texts into the two inputs, then compare them. The result highlights additions, deletions and changed sections.
The result is organized by line and highlights character changes within changed lines. There is no separate line-versus-character mode selector; line breaks, spaces and punctuation can affect the displayed differences.