HTML Checking for Large Sites

Rocket Validator automatically checks your pages on the W3C Validator.

Bad value “” for attribute “id” on element “select”: An ID must not be the empty string.

The id attribute is used to identify a single element within a document, it’s not required, but if used it must be unique, and must not be an empty string.

Related W3C validator issues

Still checking your large sites one page at a time?

Save time using our automated web checker. Let our crawler check your web pages on the W3C Validator.