---
title: "Remove Duplicate Lines · Outil gratuit et anonyme · Laurens De Leeuw"
canonical: "https://laurensdeleeuw.be/fr/tools/remove-duplicate-lines"
markdown_alternate: "https://laurensdeleeuw.be/fr/tools/remove-duplicate-lines.md"
language: "fr-BE"
content_type: "interactive-tool"
robots: "noindex, follow"
---

# Remove Duplicate Lines

Paste a list and get a clean copy with every duplicate line removed. Utilisation gratuite sans compte, adresse e-mail ni paiement. Le résultat est téléchargé immédiatement.

Paste a list and get a clean copy with every duplicate line removed.

Paste a list of emails, URLs, names, or any other lines and download a deduplicated copy in one click. Optionally ignore case and trim whitespace before comparing.

- **Category:** Text
- **Availability:** Free to use without an account, email address, subscription, or payment.
- **Input:** Entered in the browser

## How it works

1. Paste your list into the editor.
2. Choose whether to compare case-sensitively and whether to trim each line first.
3. Process and download the deduplicated.txt file.

## Use cases

- Dedupe an email list before importing into a newsletter tool.
- Remove duplicate URLs from a scrape.
- Clean a copy-pasted list of names from a meeting invite.
- Drop repeated rows out of a long log paste.

## Frequently asked questions

### Is the order preserved?

Yes. The first occurrence of every line is kept in its original position. Only later duplicates are removed.

### Can I match case-insensitively?

Yes. Untick 'Case-sensitive comparison' and 'Email@x.com' and 'email@x.com' count as the same line.

### What about lines with extra spaces?

Enable 'Trim each line before comparing' and lines that only differ in surrounding whitespace are treated as duplicates.

### How many lines can I dedupe?

Up to 2 MB of text per job, comfortably hundreds of thousands of lines.

## Related tools

- [Text Cleaner](https://laurensdeleeuw.be/fr/tools/text-cleaner)
- [Sort Lines Alphabetically](https://laurensdeleeuw.be/fr/tools/sort-lines-alphabetically)
- [Find and Replace Text](https://laurensdeleeuw.be/fr/tools/find-and-replace-text)

## Using the interactive tool

Open the [canonical HTML page](https://laurensdeleeuw.be/fr/tools/remove-duplicate-lines) to provide input and generate or download a result. This Markdown alternate contains the complete descriptive and instructional content, but it does not execute the interactive interface.