WAV to MP3
Turn a big WAV recording into an MP3 you can email or upload.
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or drag them here
WAV files · as many as you like
- Takes
- Any WAV file. Drop as many as you like and they’ll convert one after another. AIFF files don’t work in a browser.
- Size
- No limit. A 74-minute, 747 MB WAV took about 21 seconds here.
Your files stay on your device
How to use it
Drop a WAV file here and pick a quality — 192 kbps for music, 96 kbps for speech. The MP3 is about ten times smaller. Your recording stays private.
WAV files are huge — about 10 MB for every minute — so a half-hour interview can be 300 MB, far too big to email. MP3 makes it around ten times smaller.
Drop your WAV onto the box above and pick a quality. 192 kbps is great for music; most people can’t tell it from the WAV. 96 kbps is perfect for speech and even smaller. You’ll see the new size before you start, so you can aim for a limit.
MP3 removes detail you’re unlikely to notice, but you can’t get it back later. If this is your only copy or a master recording, keep the WAV.
FAQ
What quality should I pick?
192 kbps for music, 96 kbps for speech.
How much smaller will it be?
About 10 times smaller at 192 kbps, and 15 times at 96 kbps.
Will it sound worse?
Very slightly. At 192 kbps most people can’t hear a difference on music.
Is there a size limit?
No set limit. Files of a few hundred MB are fine; very long recordings may be too much for older devices.
Can anyone else hear my recording?
No. It’s converted on your device and never sent anywhere.
How it worksFor the curious
WAV stores every sample uncompressed: CD-quality stereo is 1,411 kbps regardless of content, so the size ratio depends almost entirely on the bitrate you pick — about 10× at 192 kbps and 15× at 96 kbps.
The file is decoded to raw audio and re-encoded by a WebAssembly build of the LAME MP3 encoder, downloaded once the first time you use one of these tools. Above about 256 kbps almost nobody hears a difference, and a lossless format would serve better.
The file is held in memory while it converts, so several hours of stereo can exhaust a tab on a low-memory device. Files of a few hundred megabytes are fine; a 747 MB WAV converted here in about 21 seconds.