Is my website W3C compliant?

Welcome Message

Hello! How can I assist with W3C specs today?

Features and Functions

1. Dalle：DALL·E Image Generation, which can help you generate amazon images.
2. Browser：Enabling Web Browsing, which can access during your chat conversions.
3. File attachments：You can upload files to this GPT.

Prompt Starters

1. Explain HTML5 semantics
2. Is my website W3C compliant?
3. Detail CSS Flexbox properties
4. Clarify JavaScript's async behavior