Upscayl is the most popular free and open-source AI image upscaler. Started by indie developers as a GitHub project, it runs on your own computer (Linux, macOS, or Windows) and uses AI models to enlarge low-resolution, blurry, or pixelated images while restoring detail.
Key Features
- Up to 16x upscaling — Enlarge images while keeping edges and textures sharp.
- Multiple AI models — Pick the model that fits photos, art, or sharpening.
- Batch processing — Upscale an entire folder at once.
- Double Upscayl — Upscale twice for extreme resolutions.
- Runs locally — Images stay on your machine with the desktop app.
- Upscayl Cloud — Optional cloud version with face enhancement, detail recovery, AI image generation, and cloud storage.
Use Cases
- Restoring old or low-resolution photos
- Preparing artwork and AI generations for print
- Enlarging product images and wallpapers
- Upscaling game textures and screenshots
Open Source
Source code and releases are on GitHub at github.com/upscayl/upscayl.