Image Upscaler
Enlarge a photo 2× or 4× with Lanczos interpolation and edge-aware sharpening on your GPU. Old scans and screenshots come out crisp instead of mushy.
Drop an image here or click to browse
JPG, PNG, WebP
How it works
The enlargement uses Lanczos-class high-quality resampling applied in clean doubling steps, followed by an edge-aware unsharp pass executed on your GPU through WebGL. Everything runs locally: no upload wait, no file-size cap — a 20 MP photo takes about a second on any recent laptop.
This is honest upscaling: real detail can't be invented from nothing. For photos, artwork and screenshots, quality resampling plus smart sharpening gets you most of what paid tools deliver — at zero cost, with nothing leaving your device.
Distribution tip: streaming stores want 3000×3000 cover art. Upscale here first, then use the image resize tool's RouteNote preset.