Compare Two Lists

What is Compare Two Lists?

A simple web tool that compares two lists and shows differences, overlaps, and unique items. Paste lists or upload TXT files, choose case-insensitive comparison, and run a quick match to see which items are only in A, only in B, or in both. Includes a text-replacement helper and an option to reduce output for very large lists. Handy for cleaning follower lists, contact lists, inventories, or any paired data checks.

Key features

• Compare two lists and highlight differences and overlaps quickly.
• Upload TXT files or paste lists directly into the boxes.
• Case insensitive comparison option to ignore letter casing differences.
• Reduce output for very large lists to improve performance.
• Replace text across lists using the built-in replacement tool.
• Shows counts for only-in-A, only-in-B, and both lists.