URL Slug Generator

What makes a good slug

A slug is the readable part of a URL: /blog/opening-hours. Keep it short, lowercase, and made of words a person would recognize. It is one of the few parts of a page a search engine reads before it has read anything else, and the part a human sees when you paste the link into a message.

Umlauts: u or ue?

Both appear in the wild, and the difference is not cosmetic. Ordinary Unicode normalization turns "Zürich" into "zurich", which is how most slug tools behave. German convention transliterates to "zuerich" — the same rule that turns "Müller" into "Mueller" on a passport. The second option here does that properly, including ß to ss.

Pick one and hold to it. Changing the rule later changes every URL, and old links stop working.

Hyphens, not underscores

Search engines treat a hyphen as a word separator and an underscore as a joiner, so opening_hours can be read as one word. Hyphens are the safer default; the underscore option is there for filenames and code, where the opposite convention applies.