Line Sorter

Features

• Seven orders: natural, lexicographic, numeric, date, length, reverse, random
• Natural sort compares digits as numbers: file2 before file10
• Date sorting accepts three formats; unreadable lines go last, not missing
• Random sort takes a seed so the same order can be reproduced
• Dedupe, ignore case and ignore leading whitespace, all at once
• Blank lines can be kept at the end, dropped, or sorted with the rest
• Copy any single line or the whole result
• Everything runs locally in your browser; nothing is uploaded

How to use

1. Paste the lines you want to sort
2. Pick a sort order (natural by default)
3. Tick dedupe / ignore case / ignore leading whitespace as needed, and choose how blank lines are handled
4. The result updates as you type; click Copy to take it

FAQ

What is the difference between natural and lexicographic?

Take `file10` and `file2`. Lexicographic compares character by character, `1` before `2`, so `file10` comes first. Natural compares the digit runs as numbers, 10 before 2, so `file2` comes first — which is what file lists, chapter numbers and version numbers want.

Which date formats are recognised?

Three: `2026-10-05`, `2026/10/05` (year first), and `10/05/2026` (month/day/year). A four-digit first part is read as the year, so `2026/10/05` is never mistaken for anything else.

What happens to lines without a date?

They go to the end, not missing. That way you can see at a glance which lines were not recognised as dates, instead of hunting through a result that quietly lost a few lines. The same applies to numeric sort.

Does random sort give a different order each time?

With no seed it reshuffles every run. Give a seed and the same order is reproduced — this tool runs live, so an unseeded shuffle would rearrange on every keystroke and you could never read the result.