Free Online Remove Duplicate Lines Tool
Removing duplicate lines deletes any line that already appeared earlier in the list, leaving each unique line in its original position.
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How to Use This Text Tool
- Paste your list into the input field, one item per line.
- Toggle case-sensitive matching if you want Apple and apple treated as different lines.
- The deduped list appears in the output panel with a removed-count below.
- Click Copy to use the cleaned list elsewhere.
What Is a Remove Duplicate Lines?
Deduplication shows up everywhere lists get pasted in: e-mail address exports, log lines, search-query dumps, CSV columns, brainstorm notes. A spreadsheet can do it, but takes several clicks and a Remove Duplicates dialog; this tool does it the moment you paste.
The deduplicator supports case-sensitive and case-insensitive matching, preserves the order of the first occurrences, and trims surrounding whitespace before comparing. Empty lines can be kept or stripped depending on intent.
Output is the deduped list plus a count of how many duplicates were removed. Everything runs locally — useful for log files and contact exports that should not leave your machine.
Frequently Asked Questions
Does it preserve order?
Is it case-sensitive?
What about near-duplicates?
Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.
Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.