
Preview any URL on every Mac screen at once
Paste any URL. See it rendered across all six common Mac display sizes — MacBook Air 13 and 15, MacBook Pro 14 and 16, iMac 24, and Studio Display 5K — stacked, scaled, and labeled. The notch and menu bar are where Apple puts them, so what you see matches a real fullscreen browser. Single HTML file. No signup, no tracking, no build step. Works with localhost. Download once and it runs offline forever.
MacSIM by Studio Practice allows users to preview any URL across six common Mac display sizes, including various MacBook and iMac models, in a single HTML file. It operates offline without the need for signup or tracking, and is compatible with localhost.