One paste shows the whole picture: what only you have, what only they have, and what you share.
The example below is already loaded, so you can see exactly what you get. Replace it with your own list and the result updates as you type.
📎 Doing the whole job? Compare two keyword lists → every fix for it, ticked and in the right orderGot a bigger job? The full Notepad runs the same engine on lists of any size — chain this with dedupe, sort and filter, undo any step, and save the whole routine as a recipe for next time.
running shoes
trail shoes
hiking bootsTrail Shoes
wool socksList Overlap: 3 lines vs 2 lines
Only in your list (2): running shoes, hiking boots
In both (1): trail shoes
Only in list 2 (1): wool socksShows at a glance how two lists overlap: how many lines are only in yours, only in the second list, and in both — with the lines in each group.
Compares your list with a second list and shows three groups side by side: only in your list, in both, and only in the second list, with a count for each. It combines the three list-comparison operations into one view.
Matching ignores capitals and extra spaces by default, and each list is deduplicated before comparing.
Yes. Compare Two Lists (Overlap Report) runs entirely in your browser, on this page and in the full Notepad, with no sign-up, no limits, and nothing sent to a server.
No. It is a report; copy whichever group you need.
Yes. Comparison uses sets, so 100,000-line lists compare in well under a second.
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The List Overlap Checker is one of the free tools inside Seowolf’s Notepad. Paste a list once, then dedupe, filter, sort, compare and format it in seconds — every step undoable, nothing uploaded, no account.
Open the Notepad — it’s free