Preserves first occurrence
The first version of each matching line stays in its original position.
Remove Duplicate Lines
Remove duplicate text lines with case-sensitive and blank-line options directly in your browser.
0 lines · 0 characters
All processing happens locally in your browser.
How to use Remove Duplicate Lines
- 1
Paste text with one item per line.
- 2
Choose whether matching should be case-sensitive and whether blank lines should be removed.
- 3
Process the text, then copy or download the unique lines.
Why use this tool?
Configurable matching
Treat uppercase and lowercase as different or equivalent.
Private text processing
Pasted text never leaves the current browser tab.
Frequently asked questions
Does the tool sort the remaining lines?
No. It preserves the order of the first occurrence. Use Sort Lines if you also need sorting.
Can it ignore uppercase differences?
Yes. Turn off Case-sensitive before processing the text.
Can I sort lines while removing duplicates?
Yes, you can pair this with our Sort Lines tool or toggle alphabetical sorting to organize lists instantly.
Does it preserve leading and trailing spaces?
You can choose whether to trim whitespace or preserve exact line formatting when filtering duplicates.
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