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 Document Format
Fixes a document's layout so it looks the same everywhere it is opened or printed. Wrapping an image in a PDF is good for sending and archiving, but you can no longer edit it as an image.
All PDF conversions