Google’s John Mueller recently stated that website URLs should be kept under 1,000 characters in length. This number was mentioned in a Google Webmaster Central hangout in a discussion regarding SEO (search engine optimisation) and URL length. While it’s really uncommon for URLs to ever exceed 1,000 characters, it’s still not impossible. Various factors such as parameters and sub-folders can greatly expand the length of a URL.
In the discussion, John goes on to say “These are just different URL structures that some sites have. Some sites use parameters, some sites use folders with file names. Everyone does it slightly differently.
The important part for us is that we can take that one URL that you have, we can crawl it, and we can index it with that URL and pick up the content. How you determine which URL to use is ultimately up to you.
The only thing I would watch out for is it should be, I think, less than a thousand characters – which you probably have to work pretty hard to make URLs that long.”
Hear Mueller’s full statement in the video below, starting at 42:39: