Studio Practice
Preview any URL on every Mac screen at once
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wilfredo

Studio Practice - Preview any URL on every Mac screen at once

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Studio Practice
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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.

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wilfredo
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I'm Wilfredo. I designed on a 15-inch MacBook Air for years and kept getting bug reports from teammates about how things looked on their 14-inch Pros and 27-inch Studio Displays. Every responsive testing tool I tried was built around mobile breakpoints. This one isn't. It's just the Mac displays I actually work across, side by side, properly scaled, with the notch and menu bar where they should be. It's a single HTML file. No signup, no tracking, no build step. Click Download and it runs offline forever. Localhost works too, so you can preview your dev server at every Mac size before you ship. If you've ever pushed a layout and discovered the Studio Display version looks completely different from your laptop, this is for you. Free. Open to feedback on what's missing. More displays? Custom dimensions? Side-by-side compare with a reference URL?