Remove Duplicates
Remove duplicate lines from a list while keeping the original order.
Quick answer
Remove duplicate lines from a list while keeping the original order.
How do I use the Remove Duplicates?
- 1
Paste your list - one entry per line - into the input box.
- 2
Choose whether comparisons should be case-sensitive.
- 3
Copy or download the deduplicated list.
What is the Remove Duplicates?
The Remove Duplicates tool takes a list where each entry is on its own line and returns only the unique lines. The first time a value appears it is kept; every later copy is removed. Empty lines and leading/trailing spaces are ignored when comparing.
It is one of the fastest ways to clean up an email list, a keyword list, an export from a spreadsheet or any other messy pasted list without opening Excel.
Who is the Remove Duplicates for?
Marketers cleaning email or subscriber lists, SEO specialists deduping keyword sets, developers processing log files, data analysts cleaning CSV exports, and students organising research notes.
Why use the Remove Duplicates?
- Preserves the order of first occurrence.
- Case-insensitive by default, with an optional case-sensitive mode.
- Handles very long lists - tens of thousands of lines - instantly.
- No sign-up, no upload, no ads in the workspace.
- Works entirely offline after the page loads.
When should I use the Remove Duplicates?
- Cleaning email lists before importing into a mailing platform.
- Deduping keyword lists for SEO research.
- Cleaning a CSV column pasted from a spreadsheet.
- Removing duplicate URLs from a crawl or backlink list.
- Merging two lists and stripping out the overlap.
Is the Remove Duplicates safe and private?
Yes. This tool runs entirely inside your browser - your text is never uploaded, stored on our servers or shared with third parties. You can even disconnect from the internet after the page loads and it will keep working. That makes it safe for confidential notes, drafts, private messages and unpublished work.
How do I get the best results from the Remove Duplicates?
- Make sure your entries are actually on separate lines - not separated by commas.
- Turn case-sensitive mode on if ‘USA’ and ‘usa’ should be treated as different.
- For very large lists, paste in chunks if your browser slows down.
- Follow up with the Text Sorter (coming soon) if you also want the result alphabetised.
Frequently asked questions
Does it preserve the original order?
Yes. The first occurrence of each line is kept and later duplicates are removed.
Is the comparison case-sensitive?
By default no - ‘Apple’ and ‘apple’ are treated as duplicates. You can toggle case-sensitive mode on if you need it.
Does it trim whitespace before comparing?
Yes. Leading and trailing spaces are trimmed so ‘apple ’ and ‘apple’ are treated as the same entry.
Can I use it for emails or URLs?
Absolutely - one email or URL per line is the ideal input.
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