Dashboard
← All tools
Text tools

Remove Duplicate Lines

Clean up your lists in one click.

  1. 01 · Choose input
  2. 02 · Configure
  3. 03 · Preview
  4. 04 · Download
Work in your browser

How to use Remove Duplicate Lines

Paste a list, then remove duplicate lines. The first occurrence of each exact line is kept.

Example

A, B, A on separate lines becomes A, B.

Limits and output

1 MB input. Matching is case-sensitive and does not trim whitespace. One blank line is retained.

Good to know

RatTools is an early version of an everyday utility workspace. Image, text, calculation, and developer inputs are processed in your browser.

Your favorites, recently used tool IDs, and theme choice are stored on this device. Tool inputs are not saved. Hosting can receive ordinary page requests; this app includes no analytics.

Images to PDF, merge and split work locally. PDF compression is upcoming. This early version is excluded from search indexing.

Icons: Solar by 480 Design · CC BY 4.0. Components: Be UI and shadcn/ui.