FLAC to CAF Converter
FileFlip converts FLAC to CAF entirely inside your browser, using FFmpeg compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a FLAC file to CAF?#
- Drop your FLAC file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to CAF and the conversion starts on its own. FileFlip downloads 30.8 MB of WebAssembly the first time and nothing after that, then runs FFmpeg on your own machine.
- Save the CAF file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting FLAC to CAF lose quality?#
It depends on what is inside the file. FLAC is a container rather than a codec, so whether the CAF conversion copies the streams across untouched or re-encodes them is decided by the codecs that particular file happens to use.
Is it safe to convert FLAC files online?#
Yes, because nothing is uploaded. FileFlip converts FLAC files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What FLAC to CAF actually does to the file#
Converting FLAC to CAF runs on FFmpeg, downloads 30.8 MB of WebAssembly the first time and nothing after that, re-encodes or copies through depending on the codecs in the file, and drops encoded streams.
| Engine | FFmpeg |
|---|---|
| Conversion path | One step: FLAC → CAF |
| Downloaded to your browser | 30.8 MB, once, then cached by your browser |
| Quality | Decided by the codecs inside the file |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Encoded streams | Dropped | The target format has nowhere to put it. |
What is a FLAC file?#
A FLAC file holds audio compressed with the Free Lossless Audio Codec, which shrinks the data by roughly 40-60% and reconstructs the exact original samples, bit for bit, on decode.
Use FLAC to archive or edit audio when you want compression without giving up any of the source quality.
Convert FLAC to MP3 or AAC for a portable device or streaming use case where storage space matters more than keeping a bit-perfect copy.
What is a CAF file?#
A CAF file holds audio in Apple's Core Audio Format, introduced in 2005 to replace AIFF and WAV on the Mac because its 64-bit chunk sizes have no practical file size or duration limit.
Keep audio as CAF while it stays inside Apple's own tools, such as Logic Pro, GarageBand, or an iOS app's own audio recordings, where the format's size and codec flexibility are used directly.
Convert CAF to WAV or M4A when the audio needs to leave the Apple ecosystem, since most non-Apple software has no built-in way to open it.
FLAC to CAF questions people ask#
Does converting MP3 to FLAC improve the sound quality?
No, converting MP3 to FLAC does not improve sound quality. FLAC only guarantees that what goes into the encoder comes back out unchanged; it can't restore audio detail an MP3 encoder already discarded, so the result is a larger file that sounds exactly like the MP3 it came from.
Is FLAC actually lossless?
Yes, FLAC is genuinely lossless: decoding a FLAC file reproduces the exact same digital samples that went into the encoder, bit for bit, unlike lossy formats such as MP3 or AAC that permanently discard data. The compression works by predicting each sample from the ones around it and storing only the much smaller difference.
What plays FLAC files?
VLC, foobar2000 and Audacity play FLAC on any platform, and it's natively supported by Windows Media Player since Windows 10, by the Music app on macOS since 10.13 High Sierra, and by Android's built-in player since Android 3.1. Apple's Music app on iOS has played FLAC since iOS 11.
Can you hear the difference between FLAC and a high-bitrate MP3?
For most listeners on typical equipment, no: a 320 kbps MP3 and its FLAC source are very difficult to tell apart in a blind test. FLAC's advantage isn't sounding better, it's being an exact copy, which matters for archiving, editing or any further encoding step where compounding lossy artifacts is a real risk.