It can also introduce the issue of there being no clear end to the URL , so certain content after a space can be left behind by users when copying or referencing it elsewhere. Snake case isn’t fit for URL s, and both camel case and Pascal case have no place in URL s because you shouldn’t be using capitals (also because you’re writing a URL , not JavaScript). A URL ’s structure should work as breadcrumbs, with the user being able to make their way back along the path without error at any stage.