Compare Lists
Paste two lists (one item per line) and instantly see what is only in List A, only in List B and what appears in both. Perfect for comparing emails, IDs, spreadsheets, SKUs or any dataset.
Results will appear here...
Results will appear here...
Results will appear here...
Three results at once
Instead of comparing by hand, the tool splits everything into three colored panels: items only in List A, items in both lists and items only in List B. Each panel has a copy button and an item count.
Smart options
Turn on "ignore case" to treat "Mary" and "mary" as equal, "trim extra spaces" to clean data pasted from spreadsheets, and "remove duplicates" to tidy the results. Everything recalculates instantly.
100% private and offline
The comparison happens entirely in your browser. Your lists are never sent to any server — perfect for sensitive data like customer emails or internal codes.
Frequently asked questions
How should I separate items?
One item per line. Just paste your lists straight from a spreadsheet, notepad or email.
Is the comparison case-sensitive?
By default yes, but you can enable the "ignore case" option so that "ABC" and "abc" count as the same item.
What does the "remove duplicates" option do?
It works inside each list: if the same item is repeated within your list (for example "banana" twice), the result shows it only once. Turn it off to see every repetition. This is unrelated to the items shared between the two lists, which show up in the "in both lists" panel.
Is there a size limit?
There is no practical limit. Since everything runs in your browser, you can compare thousands of lines without sending anything to the internet.