WebP is an open-source format for image files, raster images. Created in 2010 by Google for web graphics in order to quickly upload images to web pages. This is the main advantage of WebP files. Compression of images in this format can go with or without loss, depending on what level of quality you want to achieve. Thus, lossless compression is 26% better than in PNG files. If quality loss is acceptable, then compression in WebP format is 25-34% better than in JPEG files. Full support for WebP is not yet available on Firefox, Internet Explorer, and Safari.
ORF is a highly specialized raster image format. Created by Olympus camera manufacturer to store digital images taken by these devices. The name is an abbreviation for Olympus RAW File. ORF files are sometimes referred to as digital negatives. In this format, digital data from the camera sensor is stored in its original form, in excellent quality (the highest possible) and without distortion. Image storage is in its raw form. Editing an ORF file is only possible if it is converted to another format.