Remove Duplicate Lines
What is Remove Duplicate Lines?
Remove Duplicate Lines deletes repeated lines from your text and keeps the first occurrence order. Paste a list with one entry per line, and the tool shows how many duplicates were removed. It is free and works entirely in your browser.
How to use
- Paste your text with one entry per line.
- Choose case sensitive or case insensitive matching.
- The unique lines appear with a count of removed duplicates.
- Click Copy result to copy the cleaned list.
Features
- Removes repeated lines and keeps the first occurrence of each.
- Shows exactly how many duplicates were removed.
- Case sensitive mode treats "Apple" and "apple" as different lines.
- Preserves the original order of first appearances.
- Free, private, and no signup required.
Frequently asked questions
How do I remove duplicate lines online?
Paste your text with one entry per line into the box. Duplicates are removed automatically and the tool shows how many were deleted.
Is this tool free?
Yes, it is free with no signup and no limits.
Does it keep the order of my list?
Yes. The first occurrence of each line stays in its original position. Only later repeats are removed.
What is the difference between case sensitive and case insensitive?
Case sensitive treats "Apple" and "apple" as two different lines. Case insensitive treats them as the same, so the second one is removed.
Can I use it to clean email or keyword lists?
Yes. It works well for deduplicating email lists, keyword lists, and any line-based data.
Is my text sent to a server?
No. The deduplication runs in your browser with JavaScript, so your text never leaves your device.