Define a region of your screen to be shared from your ultrawide or high resolution monitor, preventing the inevitable "can you zoom in?" that comes with sharing the entire screen. Define any size region to share, move apps in and out of the region seamlessly, resize the region on the fly, set a default region and invoke with a keyboard shortcut for quick and easy sharing. Blur for privacy. Scaled presenter view displays the content your viewers are seeing. Integrated annotations and whiteboard.
I built RegionMirror out of the need to find a solution to share my 49" Ultrawide screen with colleagues using Teams, Slack, and other meeting platforms. Sharing the entire screen with someone not rocking a monster-sized screen on the receiving end of the screen share makes the content very small and unreadable. Prior to RegionMirror, sharing just a single window was how I worked around it, but that became annoying and disruptive to my flow when having to switch back and forth between applications.
With RegionMirror, you can define a portion of the screen to share and then use the "Share a window" function of the meeting tool. Then you simply move applications into the region as needed, or move the region to the applications. The shared region can be moved or resized as needed on the fly without ever stopping sharing.
You can also set up a default region that can be activated with a keyboard shortcut that you can define per monitor. This allows you to very quickly set up a screen region without having to navigate the RegionMirror menu and draw the region- just execute the shortcut and then share the region window. I find this is great for quick unplanned screen sharing sessions.
Some other notable features include:
Scaled-down and resizable presenter view displays exactly what users are seeing
Pointer and text annotations to highlight shared content
Blur the screen when entering passwords or other sensitive information
Whiteboard on the shared region can be toggled on/off to draw diagrams using various shapes, lines, and text
The MacOS app is available on the Apple App Store now. Try it for free for 7 days, then it's a one-time purchase for use on all of your MacOS devices. No subscription necessary, and no ads.
Finally a fix for the awkward "wait let me resize this window" moment on calls. The blur feature is a nice touch for hiding notifications without closing them.
The blur-for-privacy toggle is the feature I would lean on most, since I always end up typing a password into something sitting inside the shared region. Is that a manual toggle I hit before typing, or does it detect secure text fields and blur on its own? Also on the saved region: if I set it up on the ultrawide and later share from the laptop screen while undocked, does the preset clamp to the smaller display or does the shortcut just do nothing until I redraw it?
The scaled presenter view that mirrors what your audience actually sees while you keep your full ultrawide workspace is a really thoughtful detail.
Love how simple the region setup is, that keyboard shortcut for instant sharing is going to save me so much time in standups. One idea: add a quick toggle to temporarily outline the region with a visible border or color tint on your own screen, so you don't lose track of where the shared area is while presenting.
Saving region presets per app would be a game changer, like automatically snapping to your IDE when sharing VS Code and to the browser window when demoing. It would save the small hassle of repositioning every time you switch contexts during a long screen share.
The blurred privacy mask is such a thoughtful detail, like genuinely one of those features you don't realize you needed until you're mid-call scrambling to hide a Slack notification. The scaled presenter view tying it all together is really nicely executed too.
This solves a real pain point with ultrawide sharing, the blur feature and scaled presenter view are great touches. One idea: let users save multiple region presets tied to specific apps so switching between a coding layout and a slide deck happens instantly without dragging edges each time.
honestly this looks great for ultrawide users like me, one thing i'd love is the ability to save multiple preset regions and switch between them with different shortcuts, basically like profiles for different apps or meetings
Would love to see saved region presets for different apps, so I can instantly swap to my browser layout, IDE layout, or design tool layout with one shortcut instead of resizing each time.
the mirror-window trick is clean. one seam — screencapturekit blacks out drm/capture-excluded windows, so a password manager or netflix tab pulled into the region goes black for viewers while you still see it fine.
the scaled presenter view is genuinely clever, basically solving the "what are they looking at" problem that comes with screen sharing on ultrawides. the blur option is a nice touch too.
The keyboard shortcut to snap a default region is genuinely handy for daily standups, no more fumbling with window sizing mid-call.
Finally a fix for the ultrawide screen sharing headache. The scaled presenter view is honestly so nice, keeps my viewer view clean without me having to fiddle with zoom settings every call.
Would love a quick toggle to swap the shared region with a different preset on the fly, like having two or three saved rectangles I can hotkey between. Would make jumping from a code window to a browser demo way smoother without dragging edges mid-call.
The scaled presenter view is such a smart touch, basically giving you a little picture-in-picture preview of what your audience is actually seeing. Honestly that alone solves a problem I've hit dozens of times sharing my ultrawide on calls.
Love how the scaled presenter view mirrors exactly what viewers see side by side with your full layout, takes all the guesswork out of ultrawide sharing.
finally something that solves the ultrawide screen share headache, the scaled presenter view alone is worth it. been using it with my 3440x1440 and no one has asked me to zoom in once.
Would love to see a quick toggle to switch between saved region presets on the fly, maybe cycling through them with a hotkey. I often share different areas depending on the meeting and resizing each time breaks my flow.
Matt, showing just the bit that matters so nobody has to squint at my whole giant screen is such a sensible little fix, and I really like it.
About RegionMirror on Product Hunt
“Share a portion of your ultrawide or high-res screen on Mac”
RegionMirror launched on Product Hunt on July 21st, 2026 and earned 116 upvotes and 32 comments, placing #21 on the daily leaderboard. Define a region of your screen to be shared from your ultrawide or high resolution monitor, preventing the inevitable "can you zoom in?" that comes with sharing the entire screen. Define any size region to share, move apps in and out of the region seamlessly, resize the region on the fly, set a default region and invoke with a keyboard shortcut for quick and easy sharing. Blur for privacy. Scaled presenter view displays the content your viewers are seeing. Integrated annotations and whiteboard.
RegionMirror was featured in Mac (103.6k followers), Productivity (656.6k followers) and Menu Bar Apps (12.2k followers) on Product Hunt. Together, these topics include over 159.2k products, making this a competitive space to launch in.
Who hunted RegionMirror?
RegionMirror was hunted by Matt@RegionMirror. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how RegionMirror stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Matt@RegionMirror
Hi Product Hunt!
I'm Matt, solo dev and creator of RegionMirror.
I built RegionMirror out of the need to find a solution to share my 49" Ultrawide screen with colleagues using Teams, Slack, and other meeting platforms. Sharing the entire screen with someone not rocking a monster-sized screen on the receiving end of the screen share makes the content very small and unreadable. Prior to RegionMirror, sharing just a single window was how I worked around it, but that became annoying and disruptive to my flow when having to switch back and forth between applications.
With RegionMirror, you can define a portion of the screen to share and then use the "Share a window" function of the meeting tool. Then you simply move applications into the region as needed, or move the region to the applications. The shared region can be moved or resized as needed on the fly without ever stopping sharing.
You can also set up a default region that can be activated with a keyboard shortcut that you can define per monitor. This allows you to very quickly set up a screen region without having to navigate the RegionMirror menu and draw the region- just execute the shortcut and then share the region window. I find this is great for quick unplanned screen sharing sessions.
Some other notable features include:
Scaled-down and resizable presenter view displays exactly what users are seeing
Pointer and text annotations to highlight shared content
Blur the screen when entering passwords or other sensitive information
Whiteboard on the shared region can be toggled on/off to draw diagrams using various shapes, lines, and text
The MacOS app is available on the Apple App Store now. Try it for free for 7 days, then it's a one-time purchase for use on all of your MacOS devices. No subscription necessary, and no ads.