Which formats can I convert from?

Anything your browser can play: MP3, WAV, M4A and AAC, OGG and Opus, FLAC, WebM, and the sound from MP4 and MOV videos. Chrome and Edge read the most formats; if a recording won’t open in one browser, try another.

Which format should I choose?

MP3 plays on every phone, computer and car. M4A (AAC) sounds the same in a smaller file and suits Apple devices; it’s offered where your browser can make it. WAV loses no quality at all, but its files are about ten times larger.

Which quality should I pick?

Recommended (192 kbit/s) is hard to tell from the original for most music. 128 kbit/s is plenty for speech, podcasts and voice notes, in a third less space. 320 kbit/s is the most MP3 can hold, for music you care about.

Will converting improve the sound?

No. Converting keeps the quality a recording has, but it can’t bring back detail that an earlier compression removed. Converting an MP3 to WAV makes a larger file that sounds the same.

Can I convert many files at once?

Yes. Add as many as you like; they’re converted one after another and download together as one zip.

What does it use to make MP3 and M4A files?

MP3s are made by LAME, the long-standing open-source MP3 encoder, and M4A files by your browser’s own AAC encoder, through the open-source mediabunny library. Their licences are at miscdisc.app/licenses/README.txt.

Are my recordings uploaded?

No. They are converted by your browser, on your device, and saved straight back to it.

Audio · Track 01 of 04

Convert audio to MP3, WAV or M4A

Turn recordings into MP3, WAV or M4A. It happens on your device: nothing is uploaded.

Choose recordings or drop them anywhere on this page

Save as MP3: plays everywhere WAV: no quality lost, but large

Quality Smaller file (128 kbit/s): speech and podcasts Recommended (192 kbit/s) Best (320 kbit/s): music

How to convert audio

Choose the recordings to convert, or drop them anywhere on this page.
Pick the format and the quality.
Select Convert, then download the results.

Your files stay on your device

This tool runs inside your browser: your recordings are processed on your device and never uploaded. Your browser enforces which servers the page may talk to, and none of them is sent your files. Here's how you can check. Once you've used it, it works offline too.

Questions

Which formats can I convert from?: Anything your browser can play: MP3, WAV, M4A and AAC, OGG and Opus, FLAC, WebM, and the sound from MP4 and MOV videos. Chrome and Edge read the most formats; if a recording won’t open in one browser, try another.
Which format should I choose?: MP3 plays on every phone, computer and car. M4A (AAC) sounds the same in a smaller file and suits Apple devices; it’s offered where your browser can make it. WAV loses no quality at all, but its files are about ten times larger.
Which quality should I pick?: Recommended (192 kbit/s) is hard to tell from the original for most music. 128 kbit/s is plenty for speech, podcasts and voice notes, in a third less space. 320 kbit/s is the most MP3 can hold, for music you care about.
Will converting improve the sound?: No. Converting keeps the quality a recording has, but it can’t bring back detail that an earlier compression removed. Converting an MP3 to WAV makes a larger file that sounds the same.
Can I convert many files at once?: Yes. Add as many as you like; they’re converted one after another and download together as one zip.
What does it use to make MP3 and M4A files?: MP3s are made by LAME, the long-standing open-source MP3 encoder, and M4A files by your browser’s own AAC encoder, through the open-source mediabunny library. Their licences are at miscdisc.app/licenses/README.txt.
Are my recordings uploaded?: No. They are converted by your browser, on your device, and saved straight back to it.

Convert audio to MP3, WAV or M4A

How to convert audio

Your files stay on your device

Questions

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