Compare Two Lists
Find common and unique items across two lists.
How to use
- 1 Paste your first list into the List A box, one item per line.
- 2 Paste the second list into the List B box.
- 3 Adjust the matching options for case, whitespace and blanks.
- 4 Read the In both, Only in A and Only in B columns, and copy what you need.
About Compare Two Lists
Compare Two Lists takes two newline-separated lists and instantly shows you what they share and where they differ.
Paste a list on each side and the tool sorts every line into three buckets: items that appear in both lists, items that appear only in list A, and items that appear only in list B.
It is the fast way to reconcile email exports, spot missing entries between a master list and a copy, or diff two sets of IDs, SKUs or usernames.
Comparison options let you tune how strict the matching is.
Turn on "ignore case" to treat Apple and apple as the same item, enable "trim whitespace" so stray spaces around a value do not cause false mismatches, and switch on "ignore blank lines" to skip empty rows that often sneak in when copying from a spreadsheet.
Each output column is de-duplicated, so repeated entries are reported once, and the original text of the first occurrence is preserved for readability.
Every result has its own copy button, so you can lift just the differences you care about.
The comparison runs entirely in your browser — your lists are never uploaded — which makes it safe for sensitive data and keeps it working offline.
FAQ
Does the order of items matter?
No. The tool compares which items are present, not their position, so re-ordered lists still match correctly.
Are duplicate lines counted more than once?
No. Each unique value is reported once per column, with the original text of its first occurrence preserved.