MP3 to CAF Converter
Convert MP3 (MPEG-1 Audio Layer III) files to CAF (Core Audio Format) with uncompressed PCM audio for iOS and macOS development. Apple's native format optimized for Core Audio APIs and low-latency playback. Professional-quality audio conversion powered by FFmpeg, all processing happens securely in your browser.
Recommended Settings
For iOS/macOS Apps
- •Uncompressed PCM audio (16-bit)
- •Native Core Audio support
- •Optimized for Apple platforms
For Game Audio
- •Low-latency playback
- •Perfect for interactive sound
- •Standard format for iOS games
Pro Tips
- •CAF uses uncompressed PCM audio for maximum compatibility
- •CAF is the preferred format for Apple development
- •Output files will be larger than MP3 but lossless
Most Popular
CAF with PCM is the standard for iOS/macOS app audio and sound effects
When to Use This Tool
CAF is Apple's Core Audio Format, the native container for iOS and macOS audio applications and system sounds with uncompressed PCM audio.
Recommended: Uncompressed PCM
Convert MP3 to CAF for app sound effects, notifications, and background music in iOS/macOS applications requiring native format support.
Recommended: 16-bit PCM
CAF is optimized for low-latency playback on Apple platforms, ideal for game audio and interactive sound with instant playback.
Recommended: 16-bit PCM
How It Works
Upload your MP3 audio file
FFmpeg decodes MP3 and re-encodes to uncompressed PCM
Audio is packaged in CAF container with Core Audio optimizations
Download your converted CAF file ready for Apple development
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by FFmpeg.wasm (WebAssembly) for optimal performance on modern browsers.
Open Source
Built with verified, open-source libraries. Fully transparent.
Frequently Asked Questions
What is CAF format?
CAF (Core Audio Format) is Apple's native audio container format designed for macOS and iOS. This converter creates CAF files with uncompressed PCM audio (16-bit big-endian), which is the standard for Apple development with optimizations for low-latency playback.
Will converting MP3 to CAF improve quality?
Converting from lossy MP3 to uncompressed PCM in CAF won't improve quality beyond the original MP3. However, it provides a lossless container for archiving and is ideal for Apple platform compatibility and app development where CAF format is required.
Why are CAF files larger than MP3?
CAF files use uncompressed PCM audio (1,411 kbps for CD quality), while MP3 uses lossy compression (typically 128-320 kbps). The larger size ensures perfect audio reproduction for iOS/macOS applications where file size is less critical than quality and compatibility.
Why use CAF instead of other formats?
CAF is optimized for Apple platforms with better metadata support, unlimited file size, and seamless integration with Core Audio APIs. It's the preferred format for iOS/macOS development and offers more flexibility than traditional formats.
What devices and software support CAF?
CAF is natively supported on all Apple devices (iPhone, iPad, Mac) and in Xcode, Logic Pro, GarageBand, and Core Audio frameworks. Support on non-Apple platforms is limited.