Troubleshooting → Fix

Monosnap freezing on capture?
Here’s the fix.

If you pressed Ctrl+Alt+5 and the overlay never appeared, or it appeared and then locked up, this page walks through why it happens and the actual fix — not another workaround.

If this sounds familiar ↓
  • Pressed the hotkey, nothing happens for 3–8 seconds
  • Dimmed overlay appears but you can’t drag a selection
  • Selection finishes, editor never opens
  • Editor opens but annotation tools are unresponsive
  • Task Manager shows Monosnap at 400+ MB and growing
You are hitting the same freeze thousands of other Windows users have been reporting for years. It is fixable — by switching to something without the underlying architecture that causes it.

Why it freezes

Two root causes combine. The first is Monosnap's Electron shell. Every time you invoke the capture overlay, Chromium has to paint the dimmed background on top of every monitor at its native resolution, then install event listeners for the selection drag. On a single 1080p monitor this is fast; on a four-monitor setup with mixed DPI scaling, it's noticeable; on a degraded process (see below), it's a freeze.

The second cause is the gradual memory leak. After a few hours of use, Monosnap's process has accumulated several hundred MB of retained image buffers. When you press the hotkey, the OS has to juggle that large working set just to allocate room for the new capture. On machines with 8 or 16 GB of RAM, this can trigger a page fault cascade — the OS paging memory in and out to make room, locking the app while it works.

Workarounds that don’t really work

  • Restarting Monosnap periodically. Resets the RAM baseline but the leak restarts immediately.
  • Disabling multi-monitor capture. Reduces overlay paint cost but you lose the ability to capture across displays.
  • Reducing hotkey frequency. Not really a fix — you're just using the tool less.
  • Setting process priority to high. Sometimes helps briefly, doesn't address the leak.

The fix that works

Maxisnap was built specifically to eliminate the freeze-on-capture behavior. It is not Electron-based. There is no Chromium renderer, no embedded browser, no gradual memory accumulation. The capture overlay is a native Qt widget that paints in one frame. Multi-monitor is handled natively — the overlay spans every display simultaneously without per-display reinitialization. Capture-to-editor latency is under 200 ms on reasonable hardware and stays there all day.

It uses the exact same default hotkeys as Monosnap: Ctrl+Alt+5 region, Ctrl+Alt+6 full screen, Ctrl+Alt+7 region plus upload. Your workflow doesn't change.

Five quick steps

Replace Monosnap now

1.Quit Monosnap from the system tray.
2.Download the Maxisnap v2.1.5 installer.
3.Run it, accept defaults, no reboot needed.
4.Press Ctrl+Alt+5. Capture should open in under a second.
5.Configure upload in Settings → Upload if you use SFTP or S3.
FAQ

Freezing questions

Can I still recover screenshots I lost during a freeze?

Usually not — if the editor never opened, the capture was never written to disk. One of Maxisnap's small improvements is that captures are serialized to a temp file before the editor renders, so even an unexpected crash doesn't lose the image.

I use both Monosnap and OBS. Will Maxisnap conflict with OBS?

No. Maxisnap doesn't hook into the capture stream or video drivers. It uses standard Win32 capture APIs that coexist with OBS, Discord, Teams, and other applications that use the desktop duplication API.

Does Maxisnap work with remote desktop sessions?

Yes. RDP and Parsec sessions capture correctly. The overlay spans the virtual display provided by the remote host, and uploads go through your local network as usual.

Stop fighting the freeze

Install Maxisnap, keep your hotkeys, get instant capture. Free.

Download Maxisnap

Related: full crashes · slowness · Windows alternative