Compare two versions of text and see differences instantly
A diff checker compares two versions of text and highlights the differences between them. It's essential for code review, document version tracking, and understanding what changed between file versions. The tool shows added lines in green, removed lines in red, and modified lines in yellow.
Our diff checker works line-by-line and character-by-character to give you precise difference information. All processing happens in your browser for privacy and speed.
The tool uses the "Longest Common Subsequence" (LCS) algorithm to find lines that match and identify what was added, removed, or changed between two versions.
Green lines were added, red lines were removed, and yellow lines show where content was modified within a line. Unchanged lines remain white.
Yes! All comparison happens in your browser. Your text never leaves your device and is not stored anywhere.