Full Page Screenshot

Best in the Chrome extension

This scrolls a page and stitches what it sees into one tall PNG. That means scrolling and rendering the live page as you view it, which browsers only let an installed extension do on the page itself, not a separate website in another tab (and a URL you paste in can't be rendered without a full headless browser running somewhere, which is a much bigger piece of infrastructure than this site runs today). So this one stays in the Chrome extension.

See the Chrome extension