WAV to MP3 converter
Shrink a WAV recording into an MP3 about a seventh of the size.
Runs in your browser. Nothing is uploaded.
Drop an audio file
M4A, WAV, MP3, FLAC, Ogg or any audio your browser can play. It stays on your computer.
Runs on Mediabunny (MPL-2.0). MP3 encoding uses the LAME MP3 encoder (LGPL). OGG encoding uses libvorbis (BSD).
More about this tool
- 1
Add the WAV
Drop the file or choose it.
- 2
Pick a bitrate
The hint shows the MP3's size per minute at each bitrate.
- 3
Convert and download
Play the MP3 to check it, then download it.
WAV stores audio uncompressed: CD-quality stereo takes about 10 MB a minute, and 24-bit or 48 kHz recordings more. An MP3 at 192 kbps takes about 1.4 MB a minute, around a seventh, and in most listening the difference is hard to hear.
Keep the WAV as your master if you'll edit the audio again. Encode to MP3 last, once, for sharing.
320 kbps is the highest MP3 allows and the closest to the WAV. 192 kbps suits most music. 128 kbps is plenty for speech, such as a voice-over or an interview.
FFmpeg's guide recommends variable bitrate for MP3. -qscale:a 2 averages about 190 kbps; lower numbers give higher quality.
- ffmpeg -i take.wav -codec:a libmp3lame -qscale:a 2 take.mp3
Sources
Questions
No. The WAV is read and the MP3 is written in your browser. Nothing is sent anywhere.
About 1 MB a minute at 128 kbps, 1.4 MB at 192 kbps and 2.4 MB at 320 kbps, whatever the WAV's size.
192 kbps for music, 128 kbps for speech, 320 kbps when the MP3 has to stand in for the WAV.
Yes. The audio is decoded at its own sample rate and encoded to MP3, which doesn't keep bit depth.
You can, but the detail the MP3 dropped doesn't come back. Keep the original WAV if you'll need it.
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