Remove Duplicate Lines
Paste a list and get every line back once. Runs entirely in your browser.
One item per line. Paste, type, drop or open text files.
Updates as you type.
- Lines in
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- Unique lines
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- Duplicates removed
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- Blank lines removed
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Removed lines
Lines that appear more than once are listed here, most repeated first.
Paste a list to see which lines repeat.
Nothing leaves this tab
Your list is processed in your browser, in a background thread once it is long enough to matter. Nothing is uploaded, and the list is not saved: reload the page and it is gone. Only the options are remembered.
The first spelling wins
With Ignore case on, Apple, apple and APPLE count as one line, and the result keeps whichever came first. Nothing else is lower-cased. Trim spaces also removes zero-width characters at either end of a line, and Remove blank lines drops every line with nothing visible in it.
Long lists stay responsive
A list can be edited in place up to 6,000 lines and 320,000 characters, with no line over 100,000 characters. Larger lists, up to 2,000,000 lines, are shown as a read-only preview and still processed in full. Copy and Download always take every line.