Upscayl - Free AI Image Upscaler

Every upscale happens on your graphics card, not on a server. Upscayl uses the NCNN Vulkan backend, so images never leave the device and there's no queue or credit counter. Speed scales with the GPU: a modern discrete card handles a 4x pass in seconds, while older integrated graphics can take minutes per file.

The default set covers general photos, illustrations, low light shots, and texture heavy scenes. Upscayl Standard is the safe starting point, High Fidelity targets realistic detail, Digital Art is tuned for anime and line art, and Ultrasharp pushes edges hard for architecture and product shots. Remacri, Ultrasharp, and Ultramix carry non commercial licenses, so check the model list before you use output for paid work.

Turn on the batch switch and Upscayl processes every supported file in a folder with one click. Results go to the output directory you pick, with the original file names preserved. It's the practical way to handle a shoot or a scraped image set without clicking through each photo.

The built in list isn't a ceiling. You can drop extra model files into the app and select them from the model menu, and the project documents a conversion route for turning other Real-ESRGAN weights into the format Upscayl loads. That opens up community trained models for specific material, from scanned film to satellite imagery.

Double Upscayl runs the image through the model twice, which helps on very small sources such as a 150 pixel wide icon. Scale presets run from 1x to 16x, and anything past 4x is plain resizing unless you use the double pass. Test Time Augmentation is also in settings: it cleans up artifacts at roughly eight times the processing time.

You can set a target width, choose PNG, JPG, or WebP, adjust compression, and copy EXIF data from the source. A slider view and a lens view let you drag across the image to see exactly what changed. For print work, the PNG option keeps colors intact.