Remove Duplicate Lines

What you can do

• •Order-preserving unique lines
• •Optional case-insensitive match
• •Copy or download the cleaned list
• •Works with large pasted lists

How it works

1. 1

   Paste one item per line

   Keep the original order if you care about first-seen wins.

2. 2

   Choose case sensitivity

   Treat “A” and “a” as the same line when you want a looser unique pass.

3. 3

   Copy the unique list

   Download or copy the cleaned lines. Duplicates are dropped locally.

Common uses

• •Clean mailing lists or tag dumps
• •Unique a log or changelog paste
• •Prepare a sorted unique list for import

Frequently asked questions

Is the first occurrence kept?

Yes. Order is preserved: the first time a line appears, it stays; later copies are removed.

Are blank lines removed?

Blank lines are treated like any other line. Consecutive blanks collapse to a single blank if they duplicate.

Is deduping uploaded?

No. Unique-line filtering runs in your browser only.

Related tools

• Text Sorter
• Remove Extra Spaces
• Text Compare