Formassist is a free Chrome add-on developed by ruoqianfengshao. It falls under the category of browsers and specifically belongs to the subcategory of add-ons and tools. This add-on aims to simplify the process of filling out forms by automatically populating form elements with random values based on the pattern value attribute.

One of the key features of Formassist is its ability to fill input fields with random strings that match the specified pattern value attribute. This can be particularly useful when dealing with complex input requirements or when testing form validation. Additionally, Formassist supports the auto-selection of options within select elements, ensuring that a non-empty option is always chosen.

Furthermore, Formassist provides functionality for automatically checking radio buttons and checkboxes. This feature can save time when dealing with forms that require multiple selections. The add-on also offers the option to either fill or empty all form fields, making it convenient for testing different scenarios.

Formassist supports both required and non-required input elements, allowing users to fill in all elements or only the required ones. Additionally, it includes support for HTML5 input types such as email, number, URL, mobile, and telephone.

Overall, Formassist is a useful Chrome add-on for automating form filling tasks. Its ability to generate random values based on pattern attributes, along with its support for various HTML5 input types, makes it a valuable tool for developers and testers.