Paste two sets
Add the first and second lists with one item per row.
Common items finder
List Intersection – Find Common Items
Extract the shared values between two lists while preserving the order of the first list. Use case-sensitive comparison when capitalization is meaningful.
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List Intersection
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Common items
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How to use List Intersection
Choose case matching
Keep default case-insensitive matching or require exact capitalization.
Extract the overlap
The output lists each unique value found in both inputs.
Common uses
Audience overlap
Find contacts or IDs shared by two exported segments.
Keyword overlap
Identify terms shared by competitors, pages, or campaigns.
System verification
Confirm which records exist in both a source and destination.
List Intersection FAQ
What is a list intersection? +
The intersection is the set of values that appears in both List A and List B.
Does the output preserve order? +
Yes. Common values follow the order in which they first appear in List A.
Can I see non-matching values too? +
Use Compare Lists to see the common group plus values found only on either side.
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