Image Upscaler

Enlarge images up to 4× using high-quality bicubic interpolation and sharpening. Free, in-browser.

This tool uses browser-based bicubic interpolation with a sharpening pass. For AI-based upscaling that adds new detail, a dedicated ML tool is recommended.

Scale factor

1.5

Image Upscaler

The Image Upscaler enlarges images by 1.5×, 2×, 3×, or 4× using high-quality bicubic interpolation followed by an unsharp-mask sharpening pass to reduce the blur typical of simple enlargement.

How it works

The browser's high-quality canvas smoothing resamples the image.
A Laplacian sharpening pass recovers edge detail lost during upscaling.
Output is saved as lossless PNG to avoid compression artefacts.