MacSIM by Studio Practice
Preview any URL on every Mac screen at once
MacSIM by Studio Practice launched on May 27, 2026 with 70 votes, #584 of 20,538 launches that month and more than 95% of that year's launches.
What it does
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.
Preview any website at MacBook Air 13", 15", MacBook Pro 14", 16", and Studio Display 5K dimensions side by side. A small tool by Studio Practice. Download to use offline.
Free tool, no sign-up. Preview any URL across every common Mac display size — MacBook Air 13", 15", MacBook Pro 14", 16", and the 27" Studio Display 5K, stacked, scaled, and labeled. Use it here or download the single HTML file and run it offline. Best viewed on desktop — this tool previews sites at full Mac display sizes, which don't fit on afrom studiopractice.io
Does a similar job
all alternatives →
NotchificationJan 2026 · notchification.carrd.co · ▲98Compilation and Claude progress bars in your mac's notch!
Pocket ScreenJul 2026 · labs.toybird.com · ▲207Keep any Mac window visible in a floating mini screen
Touch Bar Preview2017 · touchbar.github.io · ▲100A small app to display your designs on the Touch Bar.
More dev tools this month
the category →
open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 27d ago · github.com
Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 25d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 22d ago · openbot.run
Talanoa▲340Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 20d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 27d ago · corespeed.io
Source: Product Hunt launch ↗
Launched alongside, May 2026
the whole month →
Parallel agents, diff reviewer, and multi-model comparisons
Dev tools · May 2026 · kilo.ai
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
Life & fun · May 2026 · github.com
🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md
Dev tools · May 2026 · github.com