Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Home / Text & Data / Duplicate Line Remover

Remove repeated lines, keep only repeats, ignore case and spaces.

Free, no uploads, no sign-up. Runs 100% in your browser.

Lines are compared after the options you pick are applied. The first copy of each line is kept in its original order.

Input: Text. Output: Text.

Are my files uploaded?: No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
Is it free? Are there limits or watermarks?: Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
Does it work offline?: Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Line Sorter: Sort lines A to Z, naturally, by length or number, reverse or shuffle them.
Text Cleaner: Remove duplicates, sort lines, trim spaces and strip line breaks.
Diff Checker: Compare text and code side-by-side or inline.
Time Zone Converter: Convert times across zones, keep a world clock and find meeting times that suit everyone.