Heiter
4K Anime Video Upscaler for macOS
Experience your anime classics in a whole new quality
Simple. Fast. Local.
Your favorite anime classics
are finally available in 4K
Just upload your video, Heiter takes care of the rest.
On your Mac. Offline. Free of charge.
Lightning fast
Up to 17 fps thanks to the Apple Silicon Neural Engine
Anime-optimized
AI specifically trained for cel shading and sharp lines
100% Offline
It's all local on your Mac—no internet connection required
4:3 → 16:9
Automatic crop, stretch, or blur fill
Behind the Scenes
Heiter in Detail
Of course, Heiter can do much more than that.
Here, we reveal a few details about the AI anime upscaler.
Crystal-clear anime moments
4K Upscaling for Your Classics
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.
- 4K Resolution
- Clean Lines
- Intelligent Scaling
- Maximum Details
Full-Screen Movie Experience
Goodbye black bars – Hello 16:9
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.
- Smart Blur-Fill
- Precise Crop
- Modern Video Formats
- Full widescreen
100% locally processed
Maximum Power Right on Your Mac
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.
- No Cloud Upload
- Apple Silicon Speed
- Three Power Modes
- Completely anonymous
Heiter Protection
Privacy Policy
Last updated: March 2026
1. Data Collected
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.
2. No Internet Connection Required
Heiter does not require an Internet connection.
There is no network traffic.
3. No Advertising
Heiter contains no advertising and no tracking.
4. File Access
Heiter accesses only files
that you have opened yourself via drag & drop or file selection.
No automatic access to other files or folders.
5. Contact
For questions regarding the privacy policy:
info[at]metaflash.de
6. Changes
We reserve the right to update this privacy policy.
The current version is always available at this URL.