CurlShot (curlshot.com) takes a screenshot of any website from top to bottom, as an image (PNG, JPEG or WebP) or as a PDF. Paste a web address, pick how the page is seen (computer, phone or tablet), and ads and cookie pop-ups are hidden for you.
No account is needed to try it, and nothing has to be installed. A free account gives 100 screenshots a month with no card needed.
For developers, CurlShot is one simple screenshot API for full-page screenshots, website thumbnails, HTML to image or PDF, and Open Graph images. People use it to keep a record of how a page looked, to check a site on a phone, to turn a page into a PDF, or to show link previews.