Getting an OGG file to play on everything else
What an OGG file is
OGG is an open container from the Xiph.Org Foundation, usually carrying Vorbis audio. It is efficient and free of licensing fees, but device makers never agreed to support it universally.
Why it causes trouble
Apple’s default apps, many in-car systems and plenty of budget MP3 players ignore OGG. That leaves you with a file that works on your PC but not where you want it, and MP3 is the quickest fix.
Where your OGG likely came from
Common sources are game soundtrack folders, exports from Audacity and other open-source editors, and recordings from some Linux and Android apps. These files are usually Vorbis.
Know what you are converting
The extensions .ogg, .oga, .ogx and .opus all belong to the Ogg family. Vorbis audio in .ogg converts here. Opus audio, used for many voice messages, may need the dedicated OPUS tool.
Quality in plain terms
Going from one lossy format to another loses a little more detail. At normal listening levels it is difficult to hear. If you are archiving, keep the OGG and treat the MP3 as your playback copy.
Check the extension first. If the file is .opus, try the OPUS to MP3 page. If it is .ogg, you are in the right place.