it’s beyond simple to use. This notepad trick works because of HTML’s “contenteditable” attribute that can turn any part of a web page into an interactive area for editing text.

Before you begin building your page, you should brush up on some basic HTML rules ... your pages with HTML tags – the instructions that surround material such as text, images, and links to ...

Gina Trapani, founder of the website you're reading right now, popularized a plaintext format for to-do lists way back in 2006 (please excuse any weird formatting on that nearly 20-year-old article).