Converting from WebP
WebP converts to JPG, JPEG, PNG, PDF, GIF, BMP, TIFF, ICO, SVG, AVIF, HEIC, EPS, PS, PSD, HDR and ODD. The most common by a wide margin are JPG and PNG — the two formats that open in essentially everything.
Converting to WebP: images
JPG, JPEG, JFIF, PNG, GIF, BMP, TIFF, TIF, ICO, TGA, PPM, AVIF, HEIC, HEIF, SVG, SVGZ, EPS, PS, PSD, PSB, XCF and PDF all convert into WebP.
Converting to WebP: RAW camera files
Sony ARW, Canon CR2/CR3/CRW, Nikon NEF, Adobe DNG, Fujifilm RAF, Panasonic RW2, Olympus ORF, Pentax PEF, Hasselblad 3FR, Leaf MOS, Sigma X3F, Kodak DCR, Epson ERF and Minolta MRW are all developed and encoded to WebP, with a white-balance option since RAW carries no baked-in rendering.
Converting to WebP: documents
Word (DOC, DOCX, DOCM, DOT, DOTX, ODT, RTF, TXT), spreadsheets (XLS, XLSX, XLSM, CSV, ODS, Numbers), presentations (PPT, PPTX, ODP, Keynote) and CAD drawings (DWG, DXF, DWF, EMF) are rendered page by page and encoded as WebP images.
What is not supported
Video formats are out of scope — this is an image converter. Animated WebP and animated GIF convert between each other, but MP4, MOV and WebM are not accepted.