How to compare two lists
Paste your first list into List A and your second into List B, one item per line. Ignore case, trim lines, and remove empty lines are on by default. The tool then returns five panels: only in A, only in B, in both lists, union, and symmetric difference. Copy any panel, or copy the symmetric difference to get every unmatched item at once.
Example
apple banana cherry fig
banana cherry date grape
Comparing the two lists above returns apple and fig as only in A, date and grape as only in B, and banana and cherry as present in both lists.
List comparison outputs
The comparison returns five result panels: only in A, only in B, in both lists, union, and symmetric difference. Each panel can be copied independently.
Common uses
Compare email segments, product IDs, keyword sets, inventory exports, URL lists, user IDs, or any line-based data from spreadsheets and text files. It also works as a quick way to compare two columns in Excel or Google Sheets: copy each column, paste it into a list, and read the differences.
FAQ
What is symmetric difference?
Symmetric difference means items that appear in one list or the other, but not both.
How do I compare two columns in Excel or Google Sheets?
Copy each column and paste it into List A and List B. Only in A, only in B, and in both show where the columns differ and where they match.
Are duplicates removed before comparing?
Yes. Each list is treated as a set after optional trimming and empty-line removal.
Can I compare case-insensitively?
Yes. Ignore case is enabled by default and can be turned off.
What does union mean?
The union is every item that appears in either list, with duplicates removed.
How many items can I compare?
There is no hard limit. The comparison runs in your browser, so larger lists simply take longer and use more memory.