Three straightforward steps
- Choose or paste the input requested by this tool.
- Configure the options and run the operation locally.
- Review and download or copy the result.
Text TOOL
Duplicate Line Remover
Remove duplicate text lines while preserving the original order.
ON-DEVICESelected input is processed in this browser.
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The selected input stays under your control
On-device processing means the input is handled by browser APIs on the device running this page. Closing or refreshing the page normally clears the active in-memory working session.
Read the Privacy Policy →Remove duplicate text lines while retaining order
Create a unique line list without alphabetically sorting the source.
How to use it
- Paste the line-based text.
- Choose any case or blank-line behavior offered.
- Review the count and copy the deduplicated list.
Supported input
- Plain Unicode text
- One logical item per line
Worked example
Reduce a copied email-domain list from 600 lines to the first occurrence of each unique domain.
Limitations
- Near-duplicates with punctuation differences remain distinct.
- Multi-line records cannot be recognized automatically.
Troubleshooting
- Normalize case first if uppercase differences should be ignored.
- Trim accidental spaces when visually identical lines remain.
Tool-specific questions
Is source order preserved?
Yes, the first occurrence stays in its original position.
Does it sort the output?
No, deduplication and sorting are separate operations.
Before you process
Can I use this duplicate line remover online without uploading my input?
Yes. This tool is labelled On-device, so the selected input is processed in your browser and is not sent to a ForgeMyFile processing API.
What happens if the browser cannot process it?
The tool shows a readable error and stops. It does not silently fall back to a cloud upload.
Why can performance differ between devices?
The browser is doing the work locally, so speed and practical file size depend on available memory, CPU and browser capabilities.