Questions About This Tool
Is this a character-by-character diff?
No. It is line-based, so an edited line becomes a removal plus an addition.
Why are large texts rejected?
The alignment algorithm requires work proportional to both line counts multiplied together. The limit prevents an unresponsive tab.
Can it ignore whitespace?
It can ignore leading and trailing whitespace. Whitespace inside a line remains significant.
Does it modify either input?
No. Comparison normalization creates internal keys; the visible input and displayed line text remain unchanged.