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Anime4K
What it is
Anime4K is a free, open-source set of algorithms for real-time anime upscaling and denoising. It is designed for desktop use on Windows, macOS, and Linux, and its algorithms can be implemented in any programming language. The project targets native 1080p anime encoded with h.264, h.265, or VC-1, with output listed up to 4K. Described processing includes real-time line-art CNN upscaling, line-art deblurring, denoising, resampling-artifact reduction, and experimental line darkening and thinning. Installation guidance links GLSL configurations for mpv and Plex on Windows and Linux, and for mpv, IINA, and Plex on Mac. Anime4K is not optimized for material reduced to 720p, 480p, or standard definition, and artifacts in older anime may be difficult to remove. The project says SRGANs perform better on low-resolution or heavily degraded images, but they do not run in real time. It was founded in 2019, is maintained by bloc97, and uses the MIT license.
For and against
For
- Free open-source algorithms
- Real-time anime upscaling
- Supports Windows, macOS, and Linux
- Output listed up to 4K
- Multiple player configurations documented
Against
- Not optimized for 720p or lower
- Older artifacts may remain difficult to remove
- SRGANs may perform better on degraded images
The verdict
Anime4K focuses on real-time anime enhancement with broad desktop platform support and several line-art processing options. Its stated optimization target is specific, so lower-resolution or older material may need another approach.
Who it suits
Anime4K suits viewers who want real-time anime enhancement on Windows, macOS, or Linux, especially with native 1080p sources. It is less suited to low-resolution or heavily degraded anime.
Plans and prices
Anime4K
Open-source real-time anime upscaling and denoising algorithms
Read 8 Oct 2026 · github.com
On the record
- Algorithm features
- The project describes real-time line-art CNN upscalers, line-art deblurring, denoising, resampling-artifact reduction, and experimental line darkening and thinning.github.com · read 8 Oct 2026
- Alternative use case
- The project says SRGANs perform better on low-resolution or heavily degraded images, although they do not operate in real time.github.com · read 8 Oct 2026
- Content limitations
- It is not optimized for downscaled 720p, 480p, or standard definition anime, and older anime may contain artifacts that are difficult to remove.github.com · read 8 Oct 2026
- How it works
- The algorithms are designed to let users watch upscaled anime in real time.bloc97.github.io · read 8 Oct 2026
- Language support
- The algorithms can be implemented in any programming language.bloc97.github.io · read 8 Oct 2026
- License
- The GitHub repository identifies its license as MIT.github.com · read 8 Oct 2026
- Linux integrations
- The installation instructions link GLSL configurations for mpv and Plex on Linux.github.com · read 8 Oct 2026
- Mac integrations
- The installation instructions link GLSL configurations for mpv, IINA, and Plex on Mac.github.com · read 8 Oct 2026
- Maintainer
- The official site says Anime4K is maintained by bloc97.bloc97.github.io · read 8 Oct 2026
- Optimized input
- Anime4K is optimized for native 1080p anime encoded with h.264, h.265, or VC-1.github.com · read 8 Oct 2026
- Security and compliance
- The opened official pages provide no security or compliance claims.github.com · read 8 Oct 2026
- Support
- The project asks people who own art assets shown on the site to contact [email protected] to request removal.bloc97.github.io · read 8 Oct 2026
- What it does
- Anime4K is a set of open-source algorithms for real-time anime upscaling and denoising.bloc97.github.io · read 8 Oct 2026
- Windows integrations
- The installation instructions link GLSL configurations for mpv and Plex on Windows.github.com · read 8 Oct 2026
