Remove Duplicate Lines
Remove duplicate lines from your text online instantly with our Duplicate Line Remover. Clean up lists, code, or documents and keep only unique lines—fast, private, and browser-based. No uploads, no risk, and works on any device.
Runs in your browser
WebAssembly, no server
No signup required
Open and use instantly
Files stay private
Nothing leaves your device
How It Works
Paste or type text containing duplicate lines.
Click 'Remove Duplicates' to clean the text.
Only unique lines will remain in the output.
Key Features
- Remove duplicate lines from text instantly
- Keeps only unique lines, preserves order
- Handles large lists, code, or documents
- No uploads—100% browser-based
- Works on any device
About This Tool
Clean up messy lists by removing repeated lines while preserving the first occurrence and original order. Optionally trim whitespace, treat lines case‑sensitively, and export a deduplicated result that’s ready for spreadsheets, code, or content. Everything runs locally in your browser for speed and privacy.
Frequently Asked Questions
The first occurrence of each line is kept, and order is generally preserved.
Yes, lines with different whitespace are treated as different lines.
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