Audio files come in different formats, and not every player or app reads them equally well. Let's look at how MP3, WAV, FLAC, AAC, and OGG differ, and when to choose each one.
MP3 — the universal choice
MP3 is the most widespread lossy-compressed format: it discards data that's barely noticeable to the ear, which keeps the file small. It opens on literally any device — from an old MP3 player to a car stereo. Without any special requirements, MP3 is the right default choice.
WAV — uncompressed, for editing
WAV stores audio uncompressed — the file ends up several times heavier than MP3, but with no quality loss. This is a sound engineer's format: editing, applying effects, saving repeatedly — WAV doesn't degrade with repeated operations, unlike compressed formats.
FLAC — lossless compression
FLAC compresses a file (usually to two or three times smaller than WAV) but does so without any quality loss — the audio can be unpacked back to its original state, bit for bit. It's a middle ground between WAV's size and MP3's compactness, popular with audiophiles and for archiving music.
AAC and M4A — more compact than MP3
AAC (usually packaged in an M4A container) is a more modern lossy format that delivers better quality than MP3 at the same file size. It's the standard across the Apple ecosystem (iTunes, podcasts, voice messages), but it opens pretty much everywhere.
OGG — an open format
OGG (Vorbis) is an open lossy format that serves the same purpose as MP3 and AAC, but without licensing restrictions. It shows up in games and some open-source apps, though device support is less universal than MP3's.
How to choose a format
- Need maximum compatibility — MP3.
- Working with audio professionally: editing, effects — WAV.
- Want to compress a file without losing quality, for an archive — FLAC.
- A device or app in the Apple ecosystem — AAC/M4A.
How to convert a file to the format you need
If a format doesn't fit your device or app, you don't need to find a different recording — you can convert the one you have. The audio converter translates files between MP3, WAV, FLAC, AAC, OGG, and M4A in any direction, and it also accepts WMA, OPUS, and AIFF on input. Processing happens on the server via ffmpeg, and the file is deleted right after conversion.
Worth keeping in mind: if the source file is already in a lossy-compressed format (say, MP3), converting it to WAV or FLAC won't restore the quality that's already gone — it only changes the container. To get genuinely lossless quality, the recording needs to exist in an uncompressed form to begin with.
Bottom line
MP3 covers most everyday needs, WAV and FLAC matter where quality without compromise is important, and AAC is a compact alternative to MP3 within the Apple ecosystem. Converting a file between formats takes one step, with no software to install.