What does this tool do?
The Duplicate Line Remover deletes repeated lines from a block of text, keeping only the first occurrence of each line. It preserves the original order of your lines and offers an optional case-insensitive comparison. It's handy for anyone cleaning up lists, stripping repeats from log files, or deduplicating email and keyword lists.
How to use it
- Paste your text into the input area.
- Adjust the options to fit your needs.
- Copy the processed text.
Order preserved, first occurrence kept
The tool splits your text into lines and discards any line it has already seen. For example, the input apple, banana, apple, cherry, banana, date returns apple, banana, cherry, date. This lets you deduplicate without sorting, so your list's original arrangement stays intact. A live counter shows how many lines were removed, so you immediately see how many duplicates existed.
Case-insensitive mode
By default the comparison is exact, so Apple and apple are treated as different. Tick the 'Case insensitive' box and the tool ignores letter case when comparing lines, while still keeping the original spelling of the first occurrence in the output. This is especially useful for lists where the same email address or tag appears with different capitalization. You can copy the result with a single click.
Frequently asked questions
Does it change the order of my lines?
No. The tool does not sort; it keeps each line in the position where it first appeared and only removes later repeats.
In case-insensitive mode, which spelling is kept?
The comparison ignores letter case, but the output keeps the original spelling from the line's first occurrence.
Are leading and trailing spaces considered?
Yes, lines are compared as-is. Lines that look identical but differ in whitespace count as distinct, so you may want to trim spaces first.
Is Duplicate Line Remover free?
Yes. Duplicate Line Remover and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Duplicate Line Remover works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.