Question 1

Is the comparison line-based or word-based?

Accepted Answer

Strictly line-based. The input is split at newline characters, lines are aligned using a longest-common-subsequence algorithm, and a changed line is shown as one removal followed by one addition rather than as a word-level highlight.

Question 2

What views are available?

Accepted Answer

Side by side, which aligns the original and modified lines in two columns, and Unified, which shows removals (red) and additions (green) in a single combined stream. Counts in the summary badge report the number of each.

Question 3

Can I ignore whitespace or case?

Accepted Answer

Yes. 'Ignore whitespace' trims leading and trailing whitespace before matching (it does not ignore spacing within a line), and turning off case sensitivity lowercases lines only for the comparison. Disabled spacing differences inside a line still count.

Question 4

Is the text uploaded?

Accepted Answer

No. Both inputs are compared entirely in your browser with a custom LCS algorithm — nothing is sent to a server, logged or stored.

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