Text & Writing Utilities · Free tool
Remove Duplicate Lines
Paste text and remove duplicate lines instantly with one click. Adjust case sensitivity and whitespace handling right in your browser, completely free.
Original
8
Deduped
5
Removed
3
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What it does
Paste a list of lines and strip duplicates in one click. Options let you keep first or last occurrence, preserve original order, ignore case, and trim whitespace before comparison. Stats show original line count, deduped count, and how many duplicates were removed.
Great for cleaning email lists, log files, imported CSVs, and any messy text dump. For reordering lines see text sorter; for line comparisons, diff checker.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/remove-duplicate-lines" width="100%" height="720" frameborder="0" loading="lazy" title="Remove Duplicate Lines" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Paste your list into the input textarea.
- Toggle case sensitivity, trim whitespace, and keep-first/keep-last as needed.
- Click Remove duplicates.
- Copy the deduped output.
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Learn more
Guides about this topic
- How-To & Life · GuideHow to Remove Duplicate LinesDedup text lines using exact, trimmed, or case-insensitive comparison free online. Process large files and choose preserve-first or preserve-last instantly with no signup.
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