Paste the original text in the left box and the modified text in the right box, then click the "Compare" button. Green lines are added, red strikethrough lines are removed, and grey lines are unchanged.
The tool uses the LCS (Longest Common Subsequence) algorithm to calculate line-by-line differences between two texts.
Yes, but for very large texts (thousands of lines), processing may take a few seconds.
No, all processing happens in your browser. No text is ever sent to a server.