Duplicate Line Finder
Find lines that occur more than once and report their occurrence counts.
How to use
- Paste the lines to inspect and run the finder.
Capabilities and scope
A Map counts exact line strings and duplicate entries are output in first-occurrence order.
How it works
Each line increments a count; entries above one are formatted as count× line text.
Example
a b a a reports 3× a.
Useful for
- Locate duplicate data rows or repeated log lines
Before you use it
- Case and whitespace differences create distinct keys, and lines seen only once are omitted.
Frequently asked questions
Does it remove the duplicates?
No. It leaves the source untouched and only reports duplicate lines with counts.