Remove Duplicate Lines
Remove duplicate lines from a list — with case-insensitive and whitespace-trimming options — keeping the first of each. Runs in your browser.
Runs in your browser — your file never leaves your deviceFrequently asked questions
Is Remove Duplicate Lines free to use?
Yes — Remove Duplicate Lines is completely free with no limits, no watermarks and no sign-up. It runs in your browser, so there is nothing to pay for.
Are my files uploaded or stored anywhere?
No. This tool does all its work locally in your browser using your own device's power. Your files never leave your device and we never see them.
Do I need to install anything or create an account?
No installation and no account needed. Remove Duplicate Lines works on any modern browser — Windows, Mac, Linux, Android and iPhone.
How do I use Remove Duplicate Lines?
Open the tool, add your file (or paste your content), adjust any options, then press “Remove duplicates”. Your result is ready to download in seconds.