Lowercase converter
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Converts every letter to lowercase, including accented and non-Latin ones. Useful for un-shouting text pasted from a document written in caps.
How to use the lowercase converter
Lowercasing is the standard first step in any text comparison, because "Apple" and "apple" are different strings until you fold the case. That is why database lookups, tag matching and slug generation all lowercase first. One subtlety worth knowing if you work with non-English text: case folding is not always reversible. The German ß uppercases to SS, which lowercases back to "ss" rather than "ß", and Turkish has a dotless ı whose uppercase is I while the dotted i uppercases to İ — so round-tripping through uppercase can quietly change the word.
Questions
Yes. É becomes é, Ü becomes ü, and so on across the Unicode range.