Detect missing files within a website

Screenshot of Sitebeam's broken files test

Why is it important?

Broken files usually mean part of a webpage is missing or broken.

Some broken files aren’t noticeable to the user, as the missing file may not be used in a way that is obvious. For example, a background image might be missing, but a plain background might still appear ok.

These broken files are still an issue however, as they slow down the webpage – the missing files must be unnecessarily requested and rejected by the webserver.

How is it measured?

Sitebeam looks at every file used by every webpage, and identifies any files which they use.

Note this includes files which comprise a webpage (e.g. images or stylesheets) but not files which are linked to directly as downloads (e.g. Word documents or PDFs). Those files would be discovered by the Broken links test.