Text Diff Checker
Compare two texts and see additions, deletions, and unchanged lines highlighted side by side.
What Is a Diff Checker?
A diff checker (or text compare tool) compares two blocks of text line by line and highlights the differences between them. Lines that exist only in the original are shown as removals (red), lines that exist only in the modified version are shown as additions (green), and lines that are identical in both are shown as unchanged. This is the same concept used by version control systems like Git to show code changes.
Common Use Cases
Developers use diff checkers to compare code versions, review changes before commits, and debug configuration differences between environments. Writers compare document drafts to see what was edited. System administrators compare configuration files across servers. Anyone who has ever asked "what changed?" between two versions of a text benefits from a diff tool.