This website provides a free service to validate Cascading Style Sheets (CSS) and (X)HTML documents with style sheets. Users can validate by entering a URI, uploading a file, or inputting the code directly. The validator offers various options, including profile selection (CSS level, media type, and vendor extensions) and warning levels. It also provides information about W3C's Professional Certificate Program and encourages donations to support their work. 


The W3C CSS Validation Service

This website, Code Info, is a platform for learning web development and design. It offers tutorials and resources to help users learn HTML, CSS, and JavaScript. 


Code Info | HTML CSS JavaScript - Web Development

This website, Lundevweb, is a blog dedicated to web development tutorials and resources. It features a wide range of articles covering topics like CSS animation, JavaScript, HTML, and more. 


Lundev | Lùn Dev | HTML CSS JavaScript Blogs - Free Source Code web developer

This website is a design resource platform called UIverse. The website is currently inaccessible due to security measures. The user is blocked from accessing the site and is advised to contact the site owner for assistance. 


1782 Buttons: CSS & Tailwind

coding2go.com is a website that provides coding tutorials and resources for beginners. The website offers free downloadable source code for a variety of projects, including responsive navigation bars, social media icons, and a dark mode switch. It also has a YouTube channel with video tutorials and a Udemy page with paid courses. 


Coding To-Go

This website, Colorlib, offers a wide variety of free website templates for both HTML and Bootstrap. The templates are designed to be user-friendly and include features such as contact forms, bright color palettes, and modern design. 


Best Website Templates (HTML & CSS) 2025 - Colorlib

The website, medialoot.com, is a website that offers CSS components. However, the user is unable to access the site due to a security block triggered by Cloudflare.  The message suggests the user can contact the website owner to resolve the issue. 


53+ Most-Popular CSS Components  to Download (CSS, HTML, PSD, PNG) - Medialoot

This website, "Coding Stella," is a resource for learning HTML, CSS, and JavaScript. It features tutorials, projects, quizzes, and a blog with articles about web development topics. 
