Use an online WEBP to GIF converter
Open the WEBP file in Photoshop and export it as GIF
Use GIMP to import the WEBP file and export it as GIF
Use ImageMagick with a conversion command
Use FFmpeg for animated WEBP to GIF conversion
Rename the file extension only if the file is already a GIF
Re-download the file if the WEBP is corrupted
Check whether the WEBP is animated before converting
Reduce image size if the GIF is too large
Adjust color settings to improve GIF quality