You export an email list from two different sources and several addresses show up repeated. You have a task list you need to sort alphabetically before sharing it. You want to shuffle the order of a list of names for a fair drawing. All these operations have something in common: they work line by line on a block of text, and doing them by hand on a list of hundreds of lines isn't reasonable.
The four basic operations on line lists
- Sort: alphabetical (A-Z or Z-A), or numeric if the lines are numeric values.
- Remove duplicates (deduplicate): eliminate repeated lines, keeping only one instance of each unique value.
- Reverse: flip the entire list's order, from the last line to the first.
- Shuffle: randomly reorder the lines, useful for drawings or avoiding order bias in a listing.
How to use the line tools
- Paste your list, one line per item.
- Choose the operation: sort, deduplicate, reverse or shuffle.
- Copy the result.
You can do it free with the line sorter and duplicate remover tool on this site.
Why deduplicating by hand is more error-prone than it seems
In a short list, visually spotting a repeated line is doable. In a list of 200 emails exported from two different systems, an address can be repeated with different capitalization (Ana@example.com vs ana@example.com) or with invisible trailing spaces, making a visual review miss real duplicates. Automatic, consistent deduplication avoids this kind of human error.
Real use cases
- Cleaning up contact or email lists combined from several sources, removing repeated entries before a campaign or send.
- Preparing data to import into another system, where duplicates would cause errors or redundant records.
- Organizing task lists or ideas alphabetically to review them more systematically.
- Drawing or raffling fairly, shuffling the order of a list of participants before choosing (though for picking a specific winner, a random picker with cryptographic randomness is the more suitable tool).
Frequently asked questions
Does deduplication distinguish uppercase from lowercase? It depends on how lines are compared; it's worth reviewing the result if your list mixes different capitalization for the same logical value.
What happens with empty lines? They're usually treated like any other line; review the result if your list contains blank lines that shouldn't count.
Can I sort numerically instead of alphabetically? Yes, if the lines contain numeric values, numeric order gives a different (and generally more useful) result than pure alphabetical order.
Is my list uploaded to any server? No, all processing happens in your browser.
Sort, deduplicate, reverse or shuffle any list for free with the line sorter tool, 100% in your browser.