CAF to MP3 converter
Convert CAF to MP3 in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.
Fit Meter
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Leave both at 0 for the whole file.
Bytes of your files sent anywhere: 0 B · nothing leaves this tab
Every request this page makes is listed as it happens. You’ll see our own code loading, and for some formats a codec engine, but never your file going out.
- Waiting for network activity…
Check it yourself: open your browser’s developer tools on the Network tab, or turn off Wi-Fi once the page has loaded. The tools keep working.
Related conversions
Convert other formats to MP3
Read more about the CAF format and the MP3 format, or see every audio tool and all audio conversions.
Should you convert CAF to MP3?
GarageBand, Logic or iOS sound files in CAF won’t open outside Apple apps. MP3 plays anywhere.
A lossless move: CAF and MP3 both keep every sample, so the sound is identical and you can convert back at any time.
MP3 also plays in more places: every phone, computer, car stereo, speaker and app.
CAF is Apple’s professional audio container; MP3 is the most compatible lossy audio format ever made. Use MP3 when you don’t know what will play the file: cars, old players, podcasts hosts and upload forms all take it.
How to convert CAF to MP3
- 01
Add your CAF
Drop your CAF file onto the box, or click to choose it. It is read from your disk and stays there.
- 02
Check the settings
The output is already set to MP3. Change the bitrate if you want to; the defaults suit most files.
- 03
Save the MP3
Press convert and save the MP3. Several files come back together as a ZIP.
What changes when CAF becomes MP3
Identical sound
Both formats are lossless, so the audio isn’t changed at all. Only the file size and which apps open it differ.
A one-time engine download
CAF is decoded by FFmpeg compiled to WebAssembly, a 31 MB download the first time. After that it is cached, and the conversion never leaves your device.
Expect a much smaller file
CAF: Depends on the codec inside. MP3: About 1 MB a minute at 128 kbps, 2.4 MB at 320 kbps. Shrinking the file is often the main reason to make this conversion.
This page is put together from our notes on each format, choosing only what is true of CAF and MP3, so every pairing states the same facts the same way. How these pages are made.
Why it doesn’t upload
Recordings are often private: interviews, voice notes, unreleased music. Your browser can decode and encode audio itself, so there is no reason to send it anywhere.
How to check for yourselfWorth knowing
- About the CAF. A CAF can hold uncompressed PCM, AAC or Apple Lossless, so two CAF files of the same length can differ tenfold in size.
- About the MP3. Converting a low-bitrate MP3 to 320 kbps makes it bigger without making it sound any better; what was thrown away is gone.
- MP3, WAV, M4A, OGG, Opus and FLAC are converted by your browser directly. WMA, AMR, APE, AC3 and the other specialist formats use the FFmpeg engine, a one-time 31 MB download.
Questions
Does converting CAF to MP3 lose quality?
MP3 is lossy, so a little is discarded, but at the default bitrate the difference is inaudible for nearly everyone.
Will an MP3 play in my car or on my phone?
MP3 opens everywhere: every phone, computer, car stereo, speaker and app.
Read more about this
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