Besides the fact that handling a URL might be implementation-dependent, the HTTP/1.1
specifications states in the RFC2616
that :
RFC 2616 (Hypertext Transfer Protocol — HTTP/1.1) states in section
3.2.1 that there is no limit to the length of an URI (URI is the official term for what most people call a URL).
I do not know how many maximum characters would be, at maximum, be accepted by Google Chrome, and don't even know if there currently exists such a limit. Perhaps would it be specified in an obscure define in the Chromium GIT repository or even specified by the maximum value of a text input in the Win32 API
on windows for example.
However there is a limit on most web servers regarding URL lengths. They will probably in most cases throw a 413 Entity Too Large
in response.