Remove Duplicate Lines
Paste a list of lines and instantly remove all duplicates. Keeps first occurrence of each unique line.
About This Tool
Free remove duplicate lines tool — instantly strip repeated lines from any text, list, or dataset and keep only unique lines. No sign-up, no uploads, processes entirely in your browser. Paste a list of email addresses, product IDs, keywords, or any line-by-line content and this deduplication tool removes every repeated line in one click. Common use cases: cleaning keyword lists for SEO campaigns, deduplicating email subscriber exports, removing repeated entries from CSV data, cleaning copy-pasted content from multiple sources, and filtering duplicate log entries. The tool is case-sensitive by default — "Apple" and "apple" are treated as different — but you can enable case-insensitive mode to treat them as duplicates.
How to Use
- 1
Paste your list
Paste your text with one item per line into the input.
- 2
Remove duplicates
Click Remove Duplicates. Repeated lines are removed, keeping the first occurrence.
- 3
Copy the result
Copy the cleaned list and paste it into your spreadsheet, document, or tool.