# Remove Duplicate Lines — Free Online Tool | Ibrahim Tools

> Deduplicate a list while preserving the first occurrence and original order.

Canonical: https://tools.ibrahimwali.com/remove-duplicate-lines
Author: [Muhammad Ibrahim](https://ibrahimwali.com)

## How to use

1. Paste one value per line.
2. Choose whether case and surrounding whitespace should matter.
3. Remove duplicates and copy the clean list.

## Questions and limitations

### How do I use the remove duplicate lines?

Paste one value per line. Choose whether case and surrounding whitespace should matter. Remove duplicates and copy the clean list.

### What should I check before using the result?

The first matching line is kept. Review your rules before deduplicating case-sensitive identifiers or records.

### Is my input stored or uploaded?

No. Tool input stays in browser memory and is not sent to a server. Favorites and recent tool names are saved locally only. Reloading clears your input.

## Guide

- [Remove Duplicate Lines guide](https://tools.ibrahimwali.com/blog/remove-duplicate-lines-guide)

## Related tools

- [Word Counter](https://tools.ibrahimwali.com/word-counter)
- [Text Case Converter](https://tools.ibrahimwali.com/case-converter)