What is list intersection?

List intersection returns only items that appear in BOTH lists. If List A is [apple, banana, cherry] and List B is [banana, date, cherry], the intersection is [banana, cherry].

What is list difference?

List difference (A minus B) returns items in List A that do NOT appear in List B. If A is [apple, banana, cherry] and B is [banana, date], A − B is [apple, cherry].

List Set Tools — Merge, Intersect, Difference, Zip

Set theory operations on text lists are extremely useful for data analysis, database query results, user permission management, and any scenario where you need to compare two groups of items. This tool brings the power of SQL set operations (UNION, INTERSECT, EXCEPT) to plain text lists.

Set Operations Explained

Union (A ∪ B): All items from both lists, without duplicates
Intersection (A ∩ B): Items that appear in BOTH lists
A minus B (A \ B): Items in A that are NOT in B
B minus A (B \ A): Items in B that are NOT in A
Symmetric difference: Items in either list but NOT both
Zip: Interleave items from A and B alternately

Frequently Asked Questions

How do I find emails in one list that aren't in another?

Put the first list in List A and the second in List B, then use "A minus B". The result is all items from A that don't appear in B — perfect for email list management.

What is the symmetric difference?

The symmetric difference contains items that appear in exactly one of the two lists — either in A but not B, or in B but not A. It's equivalent to (A minus B) + (B minus A) combined.

List Set Tools online

Merge, intersect, diff, and zip two text lists — runs in your browser

Set Operations Explained

Frequently Asked Questions

How do I find emails in one list that aren't in another?

What is the symmetric difference?