Heiter
4K Anime Video Upscaler
Only for Mac
Free · In‑App Purchases
Mac
Heiter brings classic anime videos into modern resolutions – entirely on your Mac.
Choose a video, resolution, engine, aspect ratio, and optional time range.
Heiter handles processing, preserves compatible tracks, and exports the result.
No cloud, no uploads, and no separate Heiter account required.
Features
- AI upscaling with Real-ESRGAN at 2× or 4×
- Classic Lanczos scaling or export at the original resolution
- 4:3 to 16:9 conversion with Crop, Blur Fill, Stretch, or Hybrid
- Live before-and-after comparison while processing
- Single-video processing with clear queue, progress, and completion views
- Custom time range with start and end times
- Cool, Balanced, and Max power modes
- Preservation of compatible audio and subtitle tracks
- Robust handling of older AVI, DivX, and Xvid files
- Video preview with MKV and AVI fallback
- Finder actions and a notification after a successful export
Heiter Pro
Heiter Pro is available as an in-app purchase and adds more power for large anime libraries:
- Additional Realtime engine powered by Anime4K and Metal
- Batch queue for processing multiple videos automatically
- Local history of completed exports
All features listed above remain available without Heiter Pro.
Privacy
All video processing takes place on your Mac. Your videos are never uploaded.
Supported Formats
- Input: MP4, MKV, MOV, M4V, and AVI
- Output for MP4, MOV, M4V, and AVI input: MP4 with HEVC/H.265
- Output for MKV input: MKV with HEVC/H.265; compatible audio and subtitle tracks are preserved
System Requirements
- macOS 14 or later
- Apple silicon required (M1 or later)
Heiter uses open-source components. Notices and licenses are available in the app.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Detect external subtitles by dropping a video folder and include them in MKV exports
- Stop processing early and save the completed portion
- Preserve chapters and chapter names in MKV exports
- Automatically adjust chapters and subtitles to selected time ranges
- Improved color preservation in previews and exports
- More stable memory usage during Anime4K upscaling, including Hybrid and Stretch adjustments
The developer, MetaFlash GbR, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- MetaFlash GbR
- Size
- 7.2 MB
- Category
- Photo & Video
- Compatibility
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- Mac
- Languages
English and 2 more
- English, German, Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Heiter Pro Lifetime $29.99
- Heiter Pro Yearly $17.99
- Heiter Pro Monthly $3.99
- Copyright
- © 2026 MetaFlash