MP3 vs M4A vs WAV: Which Format Should You Choose?
Compatibility, real-world quality, and file size compared — so you pick the right format the first time.
By the YT2MP3 team · Last updated
The quick answer
MP3 is the default choice: it plays on literally everything and keeps files small. M4A (AAC) sounds slightly better than MP3 at the same bitrate and works on all modern phones and computers. WAV is uncompressed — huge files, no quality gain for YouTube sources, and mainly useful if you plan to edit the audio in a DAW.
For most listeners converting YouTube audio, MP3 at a sensible bitrate is the right pick. Our 320 kbps myth explainer covers why cranking the bitrate higher than the source doesn't add quality.
Compatibility at a glance
| Device / app | MP3 | M4A (AAC) | WAV |
|---|---|---|---|
| Android phones | Yes | Yes (native) | Yes |
| iPhone / iPad | Yes | Yes (native) | Yes |
| Windows / macOS | Yes | Yes | Yes |
| Car stereos (USB) | Nearly always | Usually | Sometimes |
| Old MP3 players | Yes | Often no | Often no |
| Game consoles / smart TVs | Yes | Usually | Sometimes |
Quality: what actually matters
YouTube streams audio in lossy formats (usually Opus or AAC). When you convert, the output format can only preserve what's already there — never add to it. That means:
MP3 vs M4A: at the same bitrate, AAC (M4A) is a more efficient codec and keeps slightly more detail. The difference is subtle and mostly audible at lower bitrates like 96–128 kbps. WAV: converting to WAV decompresses the audio into raw PCM. It sounds identical to the lossy source but takes up roughly 10× the space.
Not sure what bitrate your file really is? See how to verify a converter isn't faking the bitrate.
File size per minute of audio
| Format / setting | Approx. size per minute | Notes |
|---|---|---|
| MP3 128 kbps | ~1 MB | Acceptable for speech and podcasts |
| MP3 192 kbps | ~1.4 MB | Good balance for music |
| MP3 320 kbps | ~2.4 MB | Max MP3 quality; see our 320 kbps page |
| M4A 128 kbps | ~1 MB | Roughly matches MP3 160–192 kbps quality |
| WAV (44.1 kHz / 16-bit) | ~10 MB | Uncompressed; for editing, not extra quality |
Which one should you pick?
Listening on your phone or sharing files? MP3 — universal support, small files. Staying inside the Apple ecosystem or want slightly better efficiency? M4A. Editing, sampling, or archiving for production work? WAV, with the understanding that it won't sound better than the source.
Ready to convert? Use the YouTube audio downloader, the YouTube Music converter, or the main YouTube to MP3 converter and pick the format that fits.
Common questions
No. YouTube delivers lossy audio, so converting to WAV only wraps that same audio in a larger uncompressed container. It cannot restore detail the source never had. WAV is useful for editing, not for extra quality.
Yes. Android has natively supported M4A/AAC playback for years, and iPhones, Windows, and macOS play it too. Only very old or niche devices lack M4A support — for those, MP3 is the safer choice.