Offline HTML5 validator. Validates either a full document or a smaller (incomplete) template, e.g. from an AngularJS or Vue.js component. Can test fragments of HTML, for instance a component template.

HTML validator is a tool that checks and validates HTML code to ensure that it adheres to the official HTML standards (W3C).

HTML forms are a crucial aspect of web development and allow users to input data that can be submitted and sent to a server for processing. However, it is essential to ensure that the data being ...

A recent tweet from Google’s Gary Illyes called attention to problem of invalid HTML. Google is fine with invalid HTML. Less well known is that there are negative outcomes associated with invalid HTML ...