Quick verdict
FLAC for storage, archive, and music libraries (half the size, identical quality). WAV when you're recording or editing in a DAW (universal compatibility, slightly faster random-access).
WAV and FLAC are both lossless — the audio you put in is bit-exact identical to what comes out. The difference is how the bits are stored: WAV stores raw uncompressed samples, FLAC compresses them with a clever algorithm that loses nothing.
A 3-minute song in WAV is about 30 MB. The same song in FLAC is about 18 MB — 40% smaller, identical audio. The only cost is a few CPU cycles when playing back.
| Feature | WAV | FLAC |
|---|---|---|
| Compression | None | Lossless |
| File size (3-min song) | ~30 MB | ~18 MB |
| Audio quality | Bit-exact | Bit-exact |
| CPU at playback | Trivial | Slightly higher (still trivial today) |
| DAW support | Universal | Modern DAWs |
| Embedded metadata | Limited (BWF extension) | Rich (Vorbis comments) |
| Use in firmware | Common | Less common |
| Random-access seeking | Instant | Slightly slower |
Use WAV when
- You're recording in a DAW and want zero processing overhead.
- You're working with a sample library where firmware or older hardware expects WAV.
- You're editing audio that you'll touch many times — slightly easier to scrub through.
Use FLAC when
- You're archiving a CD rip or master mix and want half the disk usage at zero quality cost.
- You're distributing lossless audio over the internet (FLAC is the standard for Bandcamp, Qobuz, etc.).
- You want to embed rich metadata, album art, multi-disc info.
Convert between WAV and FLAC in your browser
FAQ
- Is FLAC the same quality as WAV?
- Bit-exact identical. FLAC stores the same samples WAV does — it just packs them more efficiently. Decoding produces the original WAV bit-for-bit.
- Why isn't WAV the universal lossless format?
- For distribution: file size. A 1-hour album in WAV is ~600 MB; the same album in FLAC is ~360 MB with no quality difference. For storage and download bandwidth, FLAC wins.
- Does FLAC sound worse on cheap hardware?
- No. Any device that can decode FLAC (which is essentially all modern hardware) produces the original samples exactly. Quality depends on your DAC and speakers, not on whether you stored the audio as WAV or FLAC.
- Can I record directly to FLAC?
- Some field recorders and DAWs allow it. Most studio workflows record to WAV first because the encoder overhead — although tiny — is unwelcome during a live capture. Convert to FLAC for archival after.