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 GrayMap
The Netpbm grey-scale format — one channel, uncompressed. Colour information is discarded, not converted.
All PGM conversionsTo
Portable FloatMap
Stores each channel as a floating-point number, which is why depth maps and HDR work use it. It is large, carries no transparency, and few viewers open it.
All PFM conversions