HTTP Status Dogs - Hypertext Transfer Protocol Response status codes, and dogs
Piar.io - Create beautiful custom link previews for all your social media channels in one place
Decoder - Instantly decode error and status codes
Linkz.ai - Automatic rich link previews on hover that keep visitors on your website
HTTP Status Tester - Test URLs in bulk for their HTTP responses, by ex-Google
Mugshot Bot - Automated link preview images for your website. No more fussing with design tools or wading through thousands of stock photos.