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TEXT & DATA / LOCAL TOOL

Duplicate line finder

List repeated text lines with their occurrence counts. Exact matches are counted without changing the source.

Free to useWorks on mobileNo file upload
PRIVATE BY DESIGNBROWSER PROCESSING
AUTO DETECT
TEXT

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No upload for local tools No sign-up needed
A PRACTICAL GUIDE

When to use duplicate line finder

Identify repeated entries in a line-separated list.

Duplicate line finder illustration showing a source file and a separate result
Duplicate line finder — a separate result, with your source kept unchanged.

How to use duplicate line finder

  1. Paste the text or data into this tool’s input.
  2. Review the duplicate line finder options shown above.
  3. Run the tool and inspect the result before copying it.
GOOD TO KNOW

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.

KEEP GOING

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