Free · no signup · browser-local
Compare Two Lists for Matches and Missing Items
Paste two line-separated lists and find shared items or entries present in only one list using configurable matching rules.
Source lists
LocalPaste text or load the example to see a result.
Getting started
Paste one item per line on each side. Choose whether surrounding spaces and letter case count, then select a result group to copy or download.
Before you use the result
Each list accepts 200,000 UTF-16 units. Matching uses whole text entries. Different spellings need manual review, and identical names can belong to different people. Repeated entries are counted separately from membership.
Try an example
If A contains 007 and 010, and B contains 010 and 011, the three groups contain 007, 010 and 011 respectively.
How it works
The browser indexes whole lines and compares their membership regardless of line order. Blank lines are skipped. Each key appears once, using its first original spelling and spacing. Shared entries use list A’s order.
Frequently asked questions
Paste two lists of names or IDs to find entries only in A, in both, or only in B. Get distinct results in their original order and download any group.
How do I use Compare Two Lists?
Paste one item per line on each side. Choose whether surrounding spaces and letter case count, then select a result group to copy or download.
Does this tool upload my data?
Inputs and files are processed in your browser. Page-view analytics do not contain your tool input.
What should I check before using the result?
Each list accepts 200,000 UTF-16 units. Matching uses whole text entries. Different spellings need manual review, and identical names can belong to different people. Repeated entries are counted separately from membership.