HTTPS hosted Viewport Resizer by @maltewassermann
At the time this was built, the official site for this did not support HTTPS. It now does, so this serves as an up-to-date bookmarklet with all recent devices.
It remains as a convenient source for the below pre-configured bookmarklet. It is configured with current devices and screen sizes as of September 2022. These presets include:
javascript:void((function(d)%7Bif(self!%3Dtop%7C%7Cd.getElementById(%27toolbar%27)%26%26d.getElementById(%27toolbar%27).getAttribute(%27data-resizer%27))return false%3Bd.write(%27<!DOCTYPE HTML><html style%3D"opacity:0%3B"><head><meta charset%3D"utf-8"/></head><body><a data-viewport%3D"320x480" data-icon%3D"mobile">iPhone < 5, iPod Touch < 5th gen</a><a data-viewport%3D"320x568" data-icon%3D"mobile" data-version%3D"5s">iPhone 5/5c/5s/SE 1st gen, iPod Touch 5th gen%2B</a><a data-viewport%3D"375x667" data-icon%3D"mobile" data-version%3D"8">iPhone 6/6s/7/8/SE 2nd gen</a><a data-viewport%3D"414x736" data-icon%3D"mobile" data-version%3D"8%2B">iPhone 6/6s/7/8 Plus</a><a data-viewport%3D"375x812" data-icon%3D"mobile" data-version%3D"11">iPhone X/Xs/11 Pro</a><a data-viewport%3D"414x896" data-icon%3D"mobile" data-version%3D"11+">iPhone XR/Xs Max/11/11 Pro Max</a><a data-viewport%3D"360x780" data-icon%3D"mobile" data-version%3D"13-">iPhone 12/13 mini</a><a data-viewport%3D"390x844" data-icon%3D"mobile" data-version%3D"13">iPhone 12/13 regular and Pro</a><a data-viewport%3D"428x926" data-icon%3D"mobile" data-version%3D"13+">iPhone 12/13 Pro Max</a><a data-viewport%3D"430x932" data-icon%3D"mobile" data-version%3D"14 Max">iPhone 14 Pro Max</a>
<a data-viewport%3D"768x1024" data-icon%3D"tablet">iPad</a><a data-viewport%3D"744x1133" data-icon%3D"tablet" data-version="iPad-">iPad mini 6th gen</a><a data-viewport%3D"810x1080" data-icon%3D"tablet" data-version%3D"10.2%22">iPad 10.2"</a><a data-viewport%3D"820x1180" data-icon%3D"tablet" data-version%3D"10.9%22">iPad Air 10.9"</a><a data-viewport%3D"834x1112" data-icon%3D"tablet" data-version%3D"10.5%22">iPad Air/Pro 10.5"</a><a data-viewport%3D"834x1194" data-icon%3D"tablet" data-version%3D"Pro 11">iPad Pro 11"</a><a data-viewport%3D"1024x1366" data-icon%3D"tablet" data-version%3D"Pro 12">iPad Pro 12.9"</a><a data-viewport%3D"1280×720" data-icon%3D"display" data-version%3D"720">720p</a><a data-viewport%3D"1366x768" data-icon%3D"display" data-version%3D"768">768</a><a data-viewport%3D"1920×1080" data-icon%3D"display" data-version%3D"1080">1080p</a><a data-viewport%3D"2560×1440" data-icon%3D"display" data-version%3D"1440">1440p</a><a data-viewport%3D"3840x2160" data-icon%3D"display" data-version%3D"4K">4K (2160p)</a><a data-viewport%3D"5120x2880" data-icon%3D"display" data-version%3D"5K">5K (2880p)</a><script src%3D"https://kane-c.github.io/viewport-resizer/resizer.min.js"></script></body></html>%27)%7D)(document))%3B