Duplicate Line Finder
Find which lines in a list are duplicated, and how many times each appears.
Seeing the repeats before you act
Sometimes you do not just want duplicates gone — you want to know what they are and how often they occur. This identifies the repeated lines in a list and shows how many times each appears, so you can review the doubles before deciding what to do, rather than deleting blindly.
Paste the list and the duplicated lines are flagged with their counts.
Find versus remove
The difference from a dedupe tool is intent. Removing duplicates silently strips them and hands back a clean list; finding them shows you the repeats so you can investigate — spotting a data entry error that duplicated a row, checking why an entry appears three times, or auditing a list for accidental doubles. When you are ready to actually clean it, the remove-duplicates tool takes over.
Frequently asked questions
How is this different from removing duplicates?
This shows you which lines repeat and how often, for review; removing duplicates silently strips them into a clean list.
Does it show how many times each line appears?
Yes — each duplicated line is listed with its count.
Is my text uploaded?
No. The check happens in your browser.