Intersection means membership in both sets
It is similar to the simplest form of an inner match: only lines that are exactly present in A and B survive. That makes it useful for exact IDs or normalized names.
FREE WEB TOOL
Extract lines that appear in both lists.
Extract only the values that appear in both one-item-per-line lists. It is handy for matching attendee lists, recipient lists or other exact-ID sets.
apple / banana and B contains banana / orange, the result is only banana.Result order follows List A. Comparison is case-sensitive.
It is similar to the simplest form of an inner match: only lines that are exactly present in A and B survive. That makes it useful for exact IDs or normalized names.
Leading and trailing spaces are stripped before comparison. Spaces inside the string are preserved, so A B and AB remain different values.
Even if a value appears three times in A and twice in B, it appears once in the output. The tool compares set membership rather than frequency.
Case, full-width/half-width characters and different dash characters are still different strings. Normalize the source lists first when you need fuzzy or name-matching behavior.