OrbConvert converts your image files online. Amongst many others, we support PNG, JPG, JPEG, WEBP, GIF, SVG and TIFF. You can use the options to control image resolution, quality and file size.
From
Flexible Image Transport System
The standard format of astronomy, carrying scientific data alongside the image. Files are typically far larger than the same picture as PNG.
All FITS conversionsTo
Quite OK Image
A deliberately simple modern lossless format designed to encode and decode extremely fast. It carries transparency and beats PNG on speed, though far less software opens it yet.
All QOI conversions