Free to use list diff tool to compare two list and find differences instantly. It compares list and displays diff, similarities and matches between them.
Free online list diff & comparison tool
A simple list difference checker to compare two lists and instantly see what's different. This listdiff tool helps you diff lists by showing unique items, common entries, and everything in between.
Perfect for list comparison tasks like comparing spreadsheet columns, email lists, or product SKUs. Use this tool to list compare online — everything runs locally in your browser, keeping your data private.
Customize how lists are compared
Five ways to view your list diff
A list diff tool (also called listdiff) performs list comparison between two datasets. It works as a list difference checker, identifying items unique to each list, common items, and all differences.
To compare two list items, paste your first list in List A and second in List B (one item per line). Results show items only in A, only in B, common items, and all differences instantly.
Use this free list compare tool — no signup needed. Simply paste your data to diff lists instantly. Everything runs in your browser, keeping your data private.
To find matches, compare lists using this tool and check the "Common" output. This displays all items that exist in both List A and List B — your matching entries.
The "Common" output in this list comparison tool shows items appearing in both lists. Enable "Remove Duplicates" to also eliminate duplicates within each list.
Yes! When you compare two lists here, all processing happens locally in your browser. Your data is never uploaded — it stays completely private on your device.