4K Anime Video Upscaler for macOS
Experience your anime classics in a whole new quality
Just upload your video, Heiter takes care of the rest.
On your Mac. Offline. Free of charge.
Up to 17 fps thanks to the Apple Silicon Neural Engine
AI specifically trained for cel shading and sharp lines
It's all local on your Mac—no internet connection required
Automatic crop, stretch, or blur fill
Of course, Heiter can do much more than that.
Here, we reveal a few details about the AI anime upscaler.
Breathe new life into your classic anime videos. Heiter upscales old episodes directly on your Mac to up to 4K using advanced Real-ESRGAN technology. Enjoy crisp lines and natural colors—without any loss of quality.
Classic anime is often filmed in the old 4:3 aspect ratio. Heiter brings it into the modern age: Choose between “Crop” for a full-screen look or “Blur Fill,” which fills in the edges with a stylish blur effect.
Your videos belong to you. Heiter works entirely offline, with no cloud requirements. Optimized for Apple Silicon, the app harnesses the full power of your device for lightning-fast upscaling while ensuring maximum privacy.
Last updated: March 2026
Heiter does not collect any personal data.
The app processes all files exclusively locally on your Mac.
No data is transmitted to servers, stored, or shared.
Heiter does not require an Internet connection.
There is no network traffic.
Heiter contains no advertising and no tracking.
Heiter accesses only files
that you have opened yourself via drag & drop or file selection.
No automatic access to other files or folders.
For questions regarding the privacy policy:
info[at]metaflash.de
We reserve the right to update this privacy policy.
The current version is always available at this URL.