Converting audio looks like a one-click job, and most of the time it is. But pick the wrong format and you either bloat a file that should be small, or lose quality on one that should stay pristine. The trick is knowing which format the destination actually needs — and never throwing away your lossless master. Here's the short version of how audio formats work and how to convert without regret.
Audio formats split into two families. Lossless (WAV, FLAC, AIFF) keeps every bit of the original — perfect quality, bigger files. WAV and AIFF are uncompressed; FLAC is compressed but still lossless, so it's smaller with no quality cost. Lossy (MP3, M4A/AAC, OGG) throws away data you're unlikely to hear, to make files much smaller — great for sharing, not for archiving. The golden rule: keep a lossless master, and export lossy copies from it. Converting an MP3 back to WAV doesn't restore quality — it just makes a big file out of a small one.
Your master is a big WAV; export a 320 kbps MP3 to email or message without clogging an inbox.
Most distributors want lossless. Convert your file to WAV (or FLAC) to meet the upload spec for streaming platforms.
Some software and hardware won't read FLAC. Convert to WAV for maximum compatibility, with zero quality loss.
Convert a stack of files to one format in a single pass and download them together as a ZIP (premium).
Turn an M4A/AAC file into a universally-supported MP3 for a player or platform that's fussy about formats.
Use WAV or FLAC when you need full quality — for masters, distribution uploads or further editing. WAV is uncompressed and universally supported; FLAC is lossless but smaller. Use MP3 or M4A when you need a small, shareable file and a tiny quality trade-off is fine — for sending demos, previews or putting audio on the web. Convert to the format the destination actually requires.
Yes, a little — MP3 is a lossy format, so some data is discarded to make the file smaller. At a high bitrate like 320 kbps the difference is hard to hear. But converting MP3 back to WAV does not restore the lost quality; it just makes a bigger file. Always keep a lossless master and export MP3 copies from it.
No. AudioKit converts everything in your browser using ffmpeg.wasm — your file never leaves your device. That keeps unreleased music private and means there's no upload wait, even for large WAV files.