Remove Duplicate Lines
Delete repeated lines from any list, with options to ignore case and extra spacing.
Runs in your browser — nothing is sent or saved.
How to remove duplicate lines
- Paste your list into the box, one item per line.
- Choose whether to ignore end spaces and letter case.
- Press "Remove duplicates".
- The tool tells you how many lines it deleted, and Copy takes the result.
What counts as a duplicate
By default, two lines are the same only if they match exactly. Two options change that.
"Ignore spaces at the ends of a line" treats apple and apple as the same, which
helps when copied data has trailing spaces you cannot see. "Match upper and lower case as
the same" treats Apple and apple as one, useful for email lists where case does not
matter.
The order is kept
The tool keeps the first time a line appears and removes the later copies. The rest of your list stays in its original order, so you do not have to sort it again afterward. If you also want it sorted, run it through the alphabetical order tool next.
Where this helps
Email and phone lists often gather duplicates when you merge two sources. A keyword list for ads can hold the same term twice after a copy and paste. Log files repeat the same line hundreds of times. Removing the repeats first makes any later count or import cleaner and smaller.
FAQ
Does it keep the first copy or the last?
It keeps the first time a line appears and removes the ones after it. The order of what is left does not change.
Can it ignore capital letters?
Yes. Turn on "Match upper and lower case as the same" and Cat and cat count as one
line.
Why are two lines that look the same not being removed?
They may have a hidden space at the end, or a different case. Turn on both options and try again.
Is there a limit on list size?
No. The work happens on your device, so you can paste a very long list. A huge list may take a second on an older phone.
Is my list sent to a server?
No. It stays in your browser and is not saved anywhere.
How do I delete duplicate entries from a list?
Paste the list with one entry per line. The tool keeps the first copy and strips the duplicates from a list of any length. What remains is the unique lines, still in their original order.