Convert Audio changes a sound file into MP3, WAV or FLAC — an iPhone voice memo (M4A) into an MP3 that plays almost anywhere, a WAV recording into something small enough to send, or an MP3 into WAV for an editor that insists on it. The conversion runs in your browser with ffmpeg, so the file is never uploaded.
Converting does not improve quality. Going from MP3 to WAV or FLAC gives you a bigger file that sounds exactly like the MP3 it came from; the detail lost when the MP3 was made does not come back. The first run downloads the audio engine (about 32 MB), so it takes a moment longer than later runs.
How to use
Choose an audio file — MP3, M4A, WAV, FLAC, OGG and most other common formats open.
Pick the target format: MP3 for small files that play everywhere, WAV for editing software, FLAC for a lossless copy that is smaller than WAV.
Run it, listen to the result in the page, and download the converted file.
FAQ
Is my audio uploaded?
No. The file is decoded and re-encoded by ffmpeg running inside your browser tab. Nothing is sent to a server, and the tool works without an account.
Can I convert to AAC or M4A?
Not at the moment — the converter writes MP3, WAV or FLAC. M4A and AAC files work as the input, though, so turning an M4A voice memo into an MP3 is exactly what it does well.
Will converting to WAV or FLAC improve the sound?
No. A lossless format keeps exactly what is in the source. If the source is an MP3, the WAV or FLAC sounds the same as that MP3, only larger. Convert to lossless when software needs it, not for quality.
Can I set the MP3 bitrate?
The converter uses ffmpeg's standard MP3 settings. To choose the bitrate yourself — for example to make a file smaller — use Compress Audio, which offers 64 to 192 kbps. To pull the sound out of a video, use Extract Audio.