About the Text Diff Checker

This tool compares two blocks of text line by line and highlights the differences. Lines that were added are shown in green, lines that were removed are shown in red, and unchanged lines are displayed with a gray background. The comparison uses a longest common subsequence (LCS) algorithm to produce an accurate, minimal diff. Everything runs in your browser -- no data is sent to any server.

Use Cases

Compare two versions of a document or article
Check changes between code revisions
Verify configuration file modifications
Review edits to any text content before publishing