How Image Cosmos works

When you choose a compatible image, your browser decodes it and draws the result with its built-in Canvas technology. The finished file is generated as a temporary local download.

Limits

For device stability, files are limited to 25 MB and decoded images to 40 megapixels. Supported inputs are JPG, PNG and WebP. Browser format support can vary, especially on older devices.

Quality and transparency

JPG and WebP quality is adjustable. PNG output is lossless but often larger. JPG cannot preserve transparent pixels, so transparent areas receive the selected background colour.