Remove duplicate lines
Deduplicate a list while preserving the first occurrence. Choose case sensitivity and whether to trim surrounding whitespace.
Free · No signup · Processed in your browserLoading the interactive tool…
How to use this tool
- Paste one item per line.
- Choose whether case and surrounding spaces matter.
- Remove duplicates and copy the cleaned list.
How it works
Deduplication keeps the first occurrence in the original order. This helps prepare URL lists, campaign labels or spreadsheet values. With case sensitivity disabled, Newsletter and newsletter are treated as the same item.
What to check before using the result
This compares text, not website destinations. URLs with different query strings remain different lines. Blank lines are deduplicated as an empty value; the first is retained.
BEFORE YOU GO
Your work stays yours.
Are my files, text or numbers uploaded?
No. This tool processes the input in your browser tab. It does not send your input to our servers. Leaving or refreshing the page clears the working input.
Do I need an account or subscription?
No account is required for this public tool. You can complete the task and download the result directly. An account is useful when you want to measure visits to your own website or manage tracked campaign links.
Can I share or link to this tool?
Yes. Use the tool link below in a tutorial, team resource list or campaign checklist. The link opens an empty tool; your private input is not included.
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