Cleaning up a list with repeated entries by hand is tedious and error-prone. This tool scans your text line by line and keeps only the first occurrence of each one, instantly.
It's useful for tidying up email lists, keyword lists, log files, or any dataset where duplicates crept in from copy-pasting or merging multiple sources.
Everything runs locally in your browser — your list is never uploaded anywhere.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this conversion or calculation often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Because there's no sign-up or installation step, you can jump straight from search result to working tool in a couple of seconds.
If you find yourself needing this often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
The interface is intentionally simple, so there's no learning curve — the input goes in, the result comes out, and that's the whole interaction.
Because there's no sign-up or installation step, you can jump straight from a search result to a working tool in a couple of seconds.
For recurring tasks, having a single dependable tool beats re-deriving the same calculation or formatting by hand every time.
Getting a reliable, focused result quickly matters more for a task like this than having extra options you'll rarely use.
Because the calculation or conversion happens instantly as you type, you can experiment freely and see how changing one value affects the result.
Frequently asked questions
Does line order change?
No, the first occurrence of each unique line keeps its original position.
Can I ignore case differences?
Yes, toggle case-insensitive mode to treat "Apple" and "apple" as the same line.