Audio converter (WAV, M4A, FLAC, OGG to MP3 and back)

Files up to 100 MB and 60 minutes long.

Your file is deleted from our server as soon as the result is made, and the result 15 minutes later.

Result

Preview before you download

Add your file to begin. The result shows here.

Converting audio for an edit?

Studio edits video podcasts and interviews end to end, so there is no file to prepare.

Edit a full recording free

00:20How it works

How to convert an audio file

Add your audioMP3, WAV, M4A, AAC, OGG, OPUS, FLAC, WMA, AIFF or AMR.
Choose the formatMP3 plays everywhere. WAV and FLAC lose nothing. M4A is the Apple-friendly choice. OGG is used by games and some web apps.
Set bitrate, sample rate and channelsLeave them alone unless you were asked for something specific.
Convert and downloadThe result shows its codec, sample rate and size next to your file's.

00:30The details

What goes in and what comes out

Accepts: MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, WMA, AIFF, AMR
Returns: MP3, WAV, M4A, FLAC or OGG
Limits: Files up to 100 MB and 60 minutes long.
Privacy: Your file is uploaded to our processing server over an encrypted connection, worked on, and deleted. The uploaded file is removed as soon as the result is ready; the result is removed 15 minutes later. Nobody looks at it and it is never used for anything else.
Cost: Free. No account, no watermark, no trial that runs out.

00:35Worth knowing

Getting a good result

Lossy and lossless

MP3, M4A and OGG throw away sound the ear is unlikely to miss, which is why they are small. WAV and FLAC keep everything; FLAC is the same sound as WAV in roughly half the space. Converting MP3 to WAV does not bring anything back: it makes a large file that sounds exactly like the MP3.

Which bitrate

For speech, 128 kbps. For music, 192 or 256 kbps. Apple's podcast guidance recommends 96 to 128 kbps for mono speech and 128 to 256 kbps for stereo. A higher bitrate than your source had only makes a bigger file.

Voice memos and phone recordings

Phone recorders and chat apps save voice notes as M4A, AMR, OGG or OPUS, which some players and editors refuse. Converting to MP3 makes them open anywhere, including in transcription services.

00:40Questions

Audio converter: common questions

Is MP3 or M4A better?

At the same bitrate, M4A (AAC) sounds a little better and is what Apple devices prefer. MP3 is supported by more old devices and software. For podcasts, both are accepted.

What sample rate should I use?

Keep the original. If asked, 44.1 kHz is the music standard and 48 kHz the video standard.

When should I choose mono?

For a single voice. A mono file is half the size of stereo at the same quality, and podcast hosts accept it.

Can I convert several files at once?

One at a time, each up to 100 MB.