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
Portable PixMap
One of the Netpbm family: the simplest possible way to store a full-colour image, with no compression at all. Files are large, and it carries no transparency.
All PPM conversionsTo
Truevision Targa
A long-standing format for game textures, video frames and image editing. It carries transparency and is simple enough that almost any graphics tool opens it.
All TGA conversions