WhatsApp voice notes
Exported WhatsApp audio comes as .opus or .ogg files, which many players and editors can't open. Drop the file here and download an MP3.
Choosing a format
MP3 is the safest choice for any device. M4A (AAC) sounds a bit better at the same size. WAV and FLAC are lossless, so use them for editing; FLAC is about half the size of WAV.