W3C Multipage Validator
Here’s a handy tool for making sure that your site stays within the straight and narrow. Give it the URL of your home page and click the “Index & Validate” button, and it will spider your whole site, submit each page to the W3C validator, and tell you which pages (if any) fail the test.
It’s sobering to see how many errors there are in a site that you thought you’d coded with great care to meet all the rules – but that’s what makes this tool so valuable.
Now, I’m off to fix some validation errors…