Diff Checker

Compare two texts and highlight the differences line by line.

1 Changed1 Added0 Removed

Original

Modified

The quick brown fox

jumps over the lazy dog

leaps over the lazy cat

Hello World

—

New line added

How diff algorithms work

A diff algorithm finds the minimal set of changes to transform one text into another. The Myers algorithm (1986) is the basis for Git's change detection.

Yellow = modified line
Green = added line
Red = removed line
White = unchanged

Formula / How it works

Compares two texts line by line. 🟢 Green = added lines 🔴 Red = removed lines 🟡 Yellow = changed lines White = unchanged