Text Diff

A diff tool compares two pieces of text and highlights the differences between them. Added text is typically shown in green, removed text in red, and unchanged text in the original color. It helps identify exactly what changed between two versions.

The tool aligns both texts and compares each line. Identical lines are unchanged, modified lines show character-level changes, added lines appear only in the new text, and deleted lines appear only in the old text. Results are shown side-by-side or inline.

Comparing document versions, reviewing code changes, checking essay revisions, verifying copy-paste accuracy, comparing configuration files, finding differences in legal documents, and validating data migrations.

Most browser-based diff tools handle files up to several thousand lines efficiently. For very large files (10,000+ lines), desktop applications like WinMerge or command-line tools like diff are more suitable due to memory constraints.