Diff Checker
Text & WritingCompare two texts line by line and mark additions and deletions.
alpha
− beta
+ beta2
gamma
+ delta
Calculated Result
+2 / −1
Formula: Line LCS then insert/delete hunks
About this calculator
Paste an old version on the left and a new version on the right. Matching lines stay plain. Removed lines are marked minus; added lines are plus.
How It Works & Formula
FormulaMyers-style line diff: LCS then mark insert / delete hunks
A longest-common-subsequence walk on lines. Equal lines stay; the rest are insert or delete hunks.
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