CAF to AAC Converter
Convert CAF (Core Audio Format) files to AAC format for broad cross-platform support. Powered by FFmpeg WebAssembly. AAC is the widely adopted streaming standard compatible with all platforms.
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Continue Your Audio Journey
What is CAF to AAC Converter?
The CAF to AAC Converter decodes Apple Core Audio Format files and re-encodes them as AAC. AAC is the standard codec for Apple services, Android, and streaming platforms, offering broad compatibility and efficient file sizes. All conversion runs in your browser using FFmpeg via WebAssembly.
How does CAF to AAC Converter work?
CAF (Core Audio Format) is Apple's flexible audio container used by iOS Voice Memos, GarageBand, and macOS audio APIs. While CAF files often already contain AAC audio internally, the CAF container itself is not supported outside the Apple ecosystem. This tool re-wraps or re-encodes CAF audio as a standalone AAC file compatible with all modern platforms.
Key Features
- Converts CAF files to AAC format
- Powered by FFmpeg running in WebAssembly
- Processes entirely in your browser with no file uploads
- AAC output compatible with Apple, Android, and streaming platforms
- No extra Apple software required beyond this browser tool
- Free to use with no file size restrictions
Common Use Cases
Distribute Apple recordings on streaming platforms
Streaming services accept AAC but not CAF. Convert CAF recordings to AAC before uploading to YouTube, SoundCloud, or podcast hosts.
Share GarageBand audio with non-Apple users
Convert GarageBand CAF exports to AAC for sharing with Android or Windows users who cannot open CAF files.
Compact storage of iOS voice memos
AAC provides good quality at small file sizes. Convert CAF recordings to AAC for efficient storage on devices with limited space.
Cross-platform Apple audio
AAC is the native codec for both Apple and Android. Convert CAF to AAC to make iOS recordings playable on all modern devices.
Upload iOS recordings to cloud services
Many cloud services and collaboration tools handle AAC better than CAF. Convert before uploading for wider software compatibility.
How to Use This Tool
Export or locate your CAF file
Share from iOS Voice Memos or export from a macOS application to get a .caf file.
Upload CAF file
Click to browse or drag and drop your CAF file into the upload area.
Convert
Click Convert to AAC. FFmpeg decodes the CAF and the browser encodes the result as AAC.
Download AAC
Download your AAC file for playback or sharing on any modern platform.
Pro Tips
- 1
AAC encoding requires a Chromium-based browser (Chrome, Edge, Brave). Firefox users should choose MP3 or OGG instead.
- 2
If the CAF already contains AAC internally, re-encoding adds a small amount of additional compression.
- 3
For editing, convert to WAV first before encoding to AAC.
- 4
Keep your original CAF files after conversion.
- 5
On first use, wait a few seconds for the FFmpeg WebAssembly binary to load.
Frequently Asked Questions
If CAF already contains AAC, does converting to AAC lose quality?
If the CAF contains AAC and you re-encode to AAC, a second lossy encoding pass is applied. The quality loss is usually minor but present. If the CAF contains lossless PCM, only one lossy encoding pass occurs.
Are my files uploaded to a server?
No. FFmpeg runs in your browser via WebAssembly. Files are processed locally.
Why does the first conversion take longer?
The first conversion loads the FFmpeg WebAssembly binary. This takes a few seconds. Subsequent conversions are immediate.
What is the difference between CAF and AAC?
CAF is a container format that can hold various codecs including AAC, PCM, and ALAC. AAC is a specific audio codec. This tool extracts the audio and delivers it as a standalone AAC stream.
Why does AAC encoding require Chrome?
AAC encoding uses the WebCodecs API, which is only available in Chromium-based browsers. Use MP3 if you are on Firefox.