Remove Duplicate Lines
Delete repeated lines from a list, with optional case handling.
One item per line.
Paste a list and press Remove duplicates to see the cleaned result.
About the Remove Duplicate Lines
Merged lists always contain repeats: two exports of the same email list, a keyword sheet built from several sources, a log file with recurring entries. This tool keeps the first occurrence of every line and removes the rest, telling you exactly how many duplicates it dropped.
You can decide whether case and surrounding whitespace matter, which is important when comparing addresses or identifiers that were typed by different people.
How to use the Remove Duplicate Lines
- 1Paste your list, one item per line.
- 2Choose whether to ignore capitalisation and trim spaces before comparing.
- 3Optionally remove blank lines and sort the output.
- 4Press Remove duplicates and copy the cleaned list.
Features
- Case-sensitive or case-insensitive comparison
- Optional whitespace trimming before comparison
- Blank-line removal
- Count of lines kept and duplicates removed
- Original order preserved unless you choose to sort
Why people use it
- Clean a mailing list before import to avoid duplicate sends.
- Deduplicate keyword research merged from several tools.
- Reduce a long log extract to its distinct entries.
Common use cases
- Combining two subscriber exports into one clean list.
- Removing repeated URLs from a crawl report.
- Tidying a copied list of names before printing badges.
Privacy and your data
Everything you type or open here is processed by your own browser. No file, text or result is uploaded to a server, stored in a database or shared with anyone, and closing the tab clears it completely.
Frequently asked questions
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