List Cleaner & Compare

Clean two text lists, find items in both lists and their differences, and build one set of combined unique items without uploading the lists.

Your entries are processed by this page in your browser. The tool does not intentionally save or transmit them.

Two list sheets show an overlap and one crossed-out duplicate.
List Cleaner and Compare controls

Cleaning and matching options

Original inputs remain unchanged until you choose Clear. Limit: 10,000 lines per list and 1,048,576 bytes combined (about 1 MB).

Result

Enter lists or load the safe example.