At a glance
- Cost
- 100% free, no account
- Accepts
- 16-bit, 24-bit and 32-bit float WAV
- Saves as
- MP3 from 96 to 320 kbps
- Space saved
- Roughly 77% to 93%
- Bulk
- Whole batches at once, ZIP download
From WAV to MP3
- Add your WAV files. 16-bit, 24-bit and 32-bit float are all accepted.
- Set the MP3 bitrate. 192 kbps is the sweet spot for music, 128 kbps for spoken word.
- Convert the whole batch.
- Download each MP3, or all of them in a single ZIP.
Why encode to MP3?
An uncompressed stereo WAV uses around 10 MB per minute. A 45-minute rehearsal recording is almost half a gigabyte, which is too big for most email services and slow to upload anywhere. MP3's psychoacoustic compression removes information your ears are least likely to notice, so the same recording can drop to 40–60 MB with no obvious change in sound.
- Send demos and voice recordings by email or chat.
- Upload to podcast hosts, learning platforms and websites that expect MP3.
- Fit far more music onto a phone, USB stick or SD card.
Size calculator
| Bitrate | 10-minute recording | Saving vs. 16-bit WAV |
|---|---|---|
| 320 kbps | ≈ 24 MB | ≈ 77% |
| 192 kbps | ≈ 14 MB | ≈ 86% |
| 128 kbps | ≈ 10 MB | ≈ 91% |
| 96 kbps | ≈ 7 MB | ≈ 93% |
For voice recordings that need to be even smaller, the Audio Compressor can also convert to mono and lower the sample rate.
Common questions
Which bitrate sounds best?
320 kbps is the highest MP3 quality. Most listeners can't tell 192 kbps apart from the original, which makes it a good default.
Will converting a 24-bit WAV work?
Yes. 16-bit, 24-bit and 32-bit float WAV files are all supported.
How fast is it?
Conversion runs locally, so there's no upload wait. A typical song converts in a few seconds.
Do you store my WAV files?
No. Files are encoded in your browser and never sent to us.