Remove Duplicate Lines
Clean up your lists by removing all duplicate entries.
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About Remove Duplicate Lines
Effortlessly clean your datasets by removing duplicate lines. This tool is invaluable for developers, data analysts, and marketers who need to unique-ify large lists of emails, IDs, or logs quickly and securely.
How to Use
- Paste your list into the input box.
- The tool automatically identifies and subtracts redundant entries.
- Review the statistics comparing original vs unique line counts.
- Copy the cleaned, unique list for use in your spreadsheets or code.
Common Use Cases
- Cleaning up mailing lists to remove duplicate email addresses.
- De-duplicating log files or database export results.
- Stripping duplicate keywords from SEO research lists.
Technical Details
Implements efficient set-based logic to filter duplicates in O(n) time. All data remains in your browser, never touching a server.
Frequently Asked Questions
- Is it case-sensitive?
- The tool performs an exact string match for each line, so it is case-sensitive by default.
- Does it preserve the order?
- Yes, it keeps the first occurrence of each line and maintains the original order of the remaining unique items.
100% Private & Secure
This tool runs entirely in your browser using client-side technology. Your files and data are never sent to a server, ensuring 100% privacy and speed.