Text Diff

What is Text Diffing?

A diff (short for difference) is a comparison tool that highlights what has changed between two versions of text. Diffing is fundamental to version control systems, code review workflows, and document tracking. By identifying additions, deletions, and unchanged content at a glance, you can quickly understand what changed and verify that edits had the intended effect.

Common Use Cases for Text Comparison

• Code review — Compare your changes against the original code before submitting a pull request, ensuring you have only modified what was intended.
• Version tracking — Track changes between document revisions to see what was added, removed, or modified at each step.
• Debugging — Compare a working configuration file with a broken one to quickly identify the problematic change.
• Plagiarism detection — Compare submitted text against source material to identify copied content.
• Data migration validation — Compare exported data files against imports to verify no data was lost or corrupted during migration.

Understanding the Output

• Green highlighted lines indicate text that was added in the modified version.
• Red highlighted lines indicate text that was deleted from the original.
• Unhighlighted lines are context that remains unchanged between versions.
• The summary at the top shows the total count of additions and deletions, giving you a quick overview of the change scope.