If you’re working on the web it’s a good chance you’ve had to write a technical document at some point in your career. These are aimed at engineers and product owners but I think everyone could learn something from these free resources.
An excerpt from Technical writing courses from Google
Every engineer is also a writer.
This collection of courses and learning resources aims to improve your technical documentation. Learn how to plan and author technical documents. You can also learn about the role of technical writers at Google.