Inventory comparison
Compare inventory codes, IDs, or exported records to identify entries present in one list but missing from another.
Compare Two Lists
Paste two lists → Get shared items, one-sided differences, or a combined unique list.
Compare List Contents
Checking two rosters, inventories, or ID lists? Paste one item per line, then choose the comparison you need.
List A
List B
Result
Add items to both lists to compare their sizes and the selected result.
How to Use Compare Two Lists
1
Enter List A
Type or paste your first list into the left input box.
2
Enter List B
Type or paste your second list into the right input box.
3
Choose Comparison Mode
Select whether to find common items, differences, or unique items.
4
View Results
See the comparison results instantly, ready to copy or export.
Compare Two Lists Features
- Common Items, Only in A, Only in B, and All Unique modes
- Updates the active result whenever either input changes
- Preserves source order for one-sided comparisons
- Copies the result as newline-separated text
Common Use Cases
Roster or keyword review
Review overlap between rosters, keyword sets, labels, filenames, or other one-item-per-line data.
Limits and Important Notes
How List Comparison Works
Each input is split at newline characters. Empty rows are removed and surrounding whitespace is trimmed before two Sets are created for membership checks.
Common Items filters List A for values found in List B. The one-sided modes filter against the opposite Set, while All Unique combines both lists and removes exact repeats.
Formula
Common items = List A ∩ List B
Example
If List A contains Apple and Pear while List B contains Pear and Plum, Common Items returns Pear, Only in A returns Apple, and Only in B returns Plum.
- Comparison is case-sensitive: Apple and apple are different entries.
- Duplicate common entries in List A can appear more than once in Common Items.
- Only newline-separated input is supported.