Frostle is a native Windows AI overlay: a hotkey freezes your whole screen — even video, games or a popup — you drag a box over any region and get an instant answer. Every answer becomes a research note you save, search and export.
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Maker
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I made this because I was tired of the same loop: pause a video, screenshot, crop, open a chat, paste, type the question. And half the time the thing I wanted had already scrolled off screen.
So Frostle removes the middle part. You press Ctrl+Shift+B, the entire screen freezes into a still, you drag a box over whatever you need, and you get an answer. Summarize, explain a chart, pull a table into markdown, translate, or just ask something. You can keep asking about the same capture instead of re-uploading it, and every answer can be saved with its source link and exported as one markdown note.
The freeze is the whole point. Most screen-AI tools look at a live window, so a moving video or a tooltip that disappears the second you move your mouse is already gone. Freezing first means you get to take your time.
It's free and runs on your own Anthropic key - no account, no subscription, and nothing goes through a server of mine. The key sits in the Windows Credential Manager and requests go straight to the API. Normal use costs a few cents a day.
Built with Tauri and Rust, so the installer is 9.7 MB instead of the usual Electron 100.
Two honest caveats: it's Windows 10/11 only, and the installer isn't code-signed yet, so SmartScreen will call it an unknown publisher on first run. Working on both.
I'd really like to hear where it breaks for you. I'm here all day.
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The freeze-and-capture flow sounds really smooth, especially for video frames. One thing that would help me as a student: let me pin two answers side by side from different frozen captures so I can compare them without flipping back and forth. A split-view sticky note mode would make this way more useful for research.
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Maker
@engagementez Thanks for the request. I’ve made an update. The library has a "Compare" function: select two excerpts, and the corresponding answers will open side-by-side, with each column scrolling independently. Let me know if anything else needs adjustment.
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Finally tried Frostle and the screen-freeze hotkey is genuinely smooth, even capturing a video frame mid-playback without stutter. Saving answers as searchable notes is a really nice touch for keeping research tidy.
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Maker
@journeyer Thank you for the feedback; please let me know if you have any comments.
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Snapped a box over a frame in a YouTube tutorial and got the answer in seconds. Saving it as a searchable note is such a small touch but it actually makes me want to use it again.
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Finally tried this and the hotkey-to-region flow feels way smoother than juggling screenshots. Liked that it actually grabs moving game frames without breaking.
The freeze-and-capture flow sounds really smooth, especially for video frames. One thing that would help me as a student: let me pin two answers side by side from different frozen captures so I can compare them without flipping back and forth. A split-view sticky note mode would make this way more useful for research.
@engagementez Thanks for the request. I’ve made an update. The library has a "Compare" function: select two excerpts, and the corresponding answers will open side-by-side, with each column scrolling independently. Let me know if anything else needs adjustment.
Finally tried Frostle and the screen-freeze hotkey is genuinely smooth, even capturing a video frame mid-playback without stutter. Saving answers as searchable notes is a really nice touch for keeping research tidy.
@journeyer Thank you for the feedback; please let me know if you have any comments.
Snapped a box over a frame in a YouTube tutorial and got the answer in seconds. Saving it as a searchable note is such a small touch but it actually makes me want to use it again.
Finally tried this and the hotkey-to-region flow feels way smoother than juggling screenshots. Liked that it actually grabs moving game frames without breaking.