Sort Lines

A plain alphabetical sort compares character by character, so item10 sorts before item9 because 1 comes before 9. That is correct and it is never what anyone wants.

Natural sort reads runs of digits as numbers, giving item1, item2, item9, item10. This is what file managers do, and it is the default here. Use Numeric value instead when every line is a number and you want them compared as such — it also handles negatives and decimals correctly.

Case-insensitive is the default, so Apple and apple sort together. Turn it on for a case-sensitive sort, which puts every capitalised line before every lowercase one — occasionally what you want for code, rarely for anything else.

A plain sort orders by code point, which puts every capital letter before every lowercase one and drops accented characters after z — so Zoe, apple, Ather is a correct code-point sort and a useless list. The alphabetical option uses your browser's locale-aware comparison instead, which is why a and ather sort together in English but not in Swedish, where a is its own letter at the end of the alphabet. If you need a result that is identical on every machine, code-point order is the one that never varies.