Enter the source list
Paste the full inventory or set you want to check into List A.
A minus B calculator
Find the Difference Between Two Lists
Calculate A minus B: every unique value in the first list that is not present in the second. Switch the list order when you need the reverse difference.
No upload Free to use Works on mobile
Compare tool
List Difference
Options
Only in List A
0 resultsHow to use List Difference
Enter exclusions
Paste existing, completed, blocked, or comparison values into List B.
Get A minus B
The result contains unique items present in A but missing from B.
Common uses
Migration checks
Find records that have not reached a destination system.
SEO audits
Find URLs or keywords missing from another export or report.
Inventory gaps
Identify expected SKUs, IDs, or labels missing from a list.
List Difference FAQ
What does A minus B mean? +
It means values that exist in List A after removing every value that also appears in List B.
How do I find values only in List B? +
Swap the two input lists and run the difference again, or use the full Compare Lists tool.
Are repeated values included repeatedly? +
No. The result returns unique difference values in their original List A order.
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