Duplicate Line Remover
Remove repeated lines from any list in one click. Choose case sensitivity, keep the first or last copy, sort the result, or find only the duplicates. Free, instant, and private.
Your list stays in your browser. Nothing is uploaded or stored.
Why Remove Duplicate Lines?
Lists grow messy when you merge keywords, email addresses, URLs, or notes from different sources. Repeated lines waste space, skew counts, and cause errors when you import data. This tool finds exact repeats and removes them in a second, so you do not have to scan the list by eye.
Keyword lists
Merge keyword research from several tools and keep every keyword only once.
Emails and URLs
Clean mailing lists, link lists, and sitemaps before importing or sending.
Find the repeats
Switch to "Show only duplicated lines" to see exactly which items appear more than once.
How to Remove Duplicate Lines
1. Paste your list
Add your text with one item on each line.
2. Choose options
Set case sensitivity, which copy to keep, and optional sorting.
3. Copy the result
Check the line counts, then copy or download the cleaned list.
Frequently Asked Questions
How do I remove duplicate lines from a list?
Paste your list into the tool with one item per line and choose "Remove duplicates". The cleaned list appears instantly and you can copy it.
Does it treat uppercase and lowercase as different?
By default, no. "Apple" and "apple" count as the same line. Turn on "Case sensitive" if you want them treated as different lines.
Can I find which lines are duplicated?
Yes. Choose "Show only duplicated lines" to see each repeated line once, or "Show only lines that appear once" to see the items with no repeats.
Which copy is kept when removing duplicates?
You can choose. Keeping the first occurrence preserves the original position, and keeping the last occurrence uses the position of the final copy.
Is this tool free and private?
Yes. It is free with no sign-up, and your list is processed in your browser without being uploaded.
Review the result before using it. Keep a copy of your original list in case you need to compare it later.