Duplicate Line Remover

Duplicate Line Remover turns messy pasted lists into clean unique lists. It is useful for URLs, email drafts, keyword lists, redirect plans, spreadsheet values, log snippets, product IDs, and QA checklists where duplicates create mistakes or wasted work.

The tool trims each line, removes blank rows, keeps the first appearance of every unique value, and outputs a copyable list. This is intentionally stricter than a spreadsheet formula because it is designed for quick browser workflows, not long setup.

Use it before importing lists, comparing records, writing robots rules, preparing email QA, cleaning CSV columns, or handing a final URL list to another person. Everything runs locally and the original input remains visible so you can verify what changed.