Remove Duplicate Lines
Delete repeated lines from lists and logs while keeping the original order — with case and trim options.
This tool runs entirely in your browser. Your data never leaves your device — it is not uploaded to any server.
How to use
- 1Paste your list into the input box — one entry per line.
- 2Toggle options if you need case-insensitive matching or cleanup.
- 3Copy the deduplicated output; the original order is preserved unless you enable sorting.
Remove Duplicate Lines
Paste any list — emails, URLs, keywords, log lines — and get back the same list with duplicates removed in one pass. Options cover the usual variants: ignore letter case, trim whitespace before comparing, drop empty lines, or sort the result.
Frequently asked questions
Does it keep the original line order?
Yes. The first occurrence of each line is kept in place. Sorting only happens if you enable the sort option.
Can it treat 'Apple' and 'apple' as duplicates?
Enable 'Ignore case' and they will be treated as the same line; the first variant seen is kept.
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Embed this tool
Put this tool on your own site with one line — it runs entirely in the visitor's browser.
<iframe src="https://zoyku.com/en/tools/remove-duplicate-lines?embed=1" width="100%" height="640" style="border:0;border-radius:16px" title="Zoyku — remove-duplicate-lines" loading="lazy"></iframe>