About Remove Duplicate Lines
Clean lists, keyword sets, IDs, names or copied text by removing duplicate lines. You can optionally ignore capitalization and trim spaces before comparing.
How to use it
- Paste your list or multiline text.
- Choose whether duplicate checks should ignore letter case and surrounding spaces.
- Click Remove Duplicates, then copy the cleaned result.
Good to know
Results can vary depending on the source file, browser and device. Always keep your original file until you have checked the downloaded result. For sensitive or legally important documents, verify the output before relying on it.
Frequently asked questions
Does it keep the original order?
Yes. The first occurrence of each line is preserved and later duplicates are removed.
Can ABC and abc be treated as the same line?
Yes. Enable Ignore case before running the cleanup.
Is the text uploaded?
No. Duplicate removal runs entirely in your browser.