Duplicate line finder
List repeated text lines with their occurrence counts. Exact matches are counted without changing the source.
Enter text to get started.
Converting your file
Working on your device…
What this tool does
List repeated text lines with their occurrence counts. Exact matches are counted without changing the source.
Select a supported file or paste text.
Use the options shown in the workspace.
Download the result and review it on your device.
When to use duplicate line finder
Identify repeated entries in a line-separated list.
How to use duplicate line finder
- Paste the text or data into this tool’s input.
- Review the duplicate line finder options shown above.
- Run the tool and inspect the result before copying it.
Frequently asked questions
Are uppercase and lowercase lines duplicates?
Only exact matches are grouped. Case and whitespace differences remain distinct.
Does the tool delete repeated lines?
No. It reports the duplicate lines and counts. Use the text sorter with duplicate removal if you want a deduplicated list.
Are empty lines counted?
No. Blank lines are excluded from the duplicate report.
What if no line repeats?
The result explicitly says that no duplicate lines were found.