Find Common Items in Two Lists — Free List Intersection Tool
Paste two lists and instantly see everything they share. Find common customers, shared ingredients, mutual contacts, overlapping products — whatever your lists contain.
Live preview · Open the full tool to export your common items list as CSV.
When You Need to Find Common Items
List intersection (finding items in both lists) is useful any time you have two overlapping datasets and need to know where they meet:
- Shared customersFind customers who appear in both your CRM and a partner's database — for co-marketing or deduplication.
- Mutual contactsCompare two networking lists, LinkedIn exports, or attendee lists to find the connections you share.
- Recipe ingredientsFind which ingredients two recipes have in common — useful for meal planning, allergy checking, or shopping consolidation.
- Product overlapCompare two store catalogs or supplier lists to find products both carry — for price comparison or gap analysis.
- Tag or label overlapCompare content tags, skills, or category labels across two systems to find common taxonomy.
- Duplicate detectionFind names, IDs, or values that appear in both lists — the simplest way to detect overlap before merging datasets.
Frequently Asked Questions
How do I find common items between two lists?
Paste the first list into List A and the second into List B. The "Common to both" column shows every item that appears in both lists — the intersection. You can copy or export this result directly.
What is list intersection?
Set (or list) intersection means finding items that exist in BOTH lists at the same time. If List A has {apple, banana, cherry} and List B has {banana, cherry, date}, the intersection is {banana, cherry}.
What's the difference between this and "find missing items"?
"Find missing items" focuses on what's in one list but not the other. Finding common items focuses on what appears in both — the opposite question. This tool shows you all three results at once.
Can I find common items across more than two lists?
Run the comparison two lists at a time. Find the common items for A vs. B, copy that result, then compare it against List C to find items in all three.
Is the comparison case-sensitive?
By default, no — "APPLE" matches "apple". Toggle case-sensitive matching in the full tool if your data is case-sensitive.