GrowNiti LabsDev Tools • Free & private

Remove duplicate lines

Delete repeated lines from a list and keep the first one of each, in the original order.

Runs in your browser. Your data is not uploaded or stored.

How to use it

  1. Paste or type your lines in the input box, or upload a file.
  2. The result appears as you type. Change the options above it if you need to.
  3. Copy the result or download it as a file.

Good to know

  • By default “Apple” and “apple” count as the same line. Tick Match case to keep both.
  • The first copy of each line is kept, so the list order does not change.

Questions

Is my data uploaded anywhere?
No. Everything runs in your browser with JavaScript. What you type or paste never leaves your device.

Privacy

Your data stays on your device

  • Nothing uploaded
  • No account needed
  • No tracking cookies
Read the privacy notice

Every tool runs in your web browser. Text you paste and files you open are processed on your own device. We do not upload, store or sell them, and you do not need an account.

If you switch theme, that choice is saved in your browser so the site remembers it. Pages load fonts from Google Fonts, so your browser connects to Google’s servers to download them. We do not use advertising or tracking cookies; if that changes, this notice will be updated first.

Full privacy policy · grownitilabs@gmail.com

Disclaimer

Free tools, provided as they are

  • Check important results
  • No guarantee
  • Not professional advice
Read the disclaimer

These tools are free and provided as they are, without any warranty. We work hard to make results accurate, but please check anything important before you rely on it, especially converted data, generated passwords and hashes.

The JWT decoder shows what a token contains but does not verify its signature. Nothing on this site is legal, financial or security advice. GrowNiti Labs is not responsible for any loss arising from use of these tools.