Convert CAF to AAC Online
Create AAC files from CAF sources with a free online converter. The conversion runs on the server, batches are supported, and the server limit is 100 MB per file. Keep the original file while you review the converted copy. The tool works without a plugin or extension.
Convert .CAF to .AAC
Select a file to begin. Processing details and limits are listed below.
How to convert CAF to AAC
- 1
Upload CAF files
Add one or more CAF files to the queue. The uploader keeps batch items separate.
- 2
Set the AAC options
Set the available quality or format options, or keep the defaults for a first pass.
- 3
Create the AAC file
Run the queue and download the AAC files individually or together as a ZIP.
Core Audio Format vs Advanced Audio Coding
| Spec | Core Audio Format | Advanced Audio Coding |
|---|---|---|
| MIME type | audio/x-caf | audio/aac |
| Format type | audio | audio |
| Contents | Apple Core Audio format. | Standard audio for streaming. |
About Core Audio Format
Apple Core Audio format.
About Advanced Audio Coding
Standard audio for streaming.
Why convert CAF to AAC?
- The new format may support a feature the source container does not.
- The result can be reviewed without changing the file that other people still use.
- AAC is more appropriate for the target application, device, or delivery channel than CAF.
- Compatibility is the main reason to convert when another person or service cannot open the source.
Will quality change?
Lossy AAC output reduces file size by discarding some audio information. Use the original master for further editing. Keep the source if you may need to adjust the conversion later.
Processing and limits
- Processing
- Server-side
- Engine
- FFmpeg
- Maximum size
- 100 MB per file on the server.
- Batch support
- Yes, multiple files can be queued; completed results can be downloaded as a ZIP.
- Quality controls
- Options can adjust quality, audio bitrate.
The file is processed on the server because the conversion requires a server-side engine or a utility operation.
- CAF features without a direct AAC equivalent may not survive the conversion.
- Review the converted file in the destination application before deleting the source.
- Batch results should be spot-checked before publication or delivery.
Platform compatibility
The output is a AAC file. Use an application or device that accepts that format, and test the result on the destination platform if compatibility is critical.
When not to convert
- Do not use a converted file as the legal or signed original when signatures or metadata must be preserved.
- Do not overwrite the source; keep both versions until the output has been approved.
- Avoid repeated lossy conversions when quality matters; start from the highest-quality source available.
Frequently asked questions
- How do I convert CAF to AAC online?
- Upload a CAF file, choose the available AAC options, run the conversion, and download the result. The tool is free, supports batches, and accepts server uploads up to 100 MB.
- Does Convert CAF to AAC require an account?
- It is free, requires no account, and adds no watermark. Server uploads are limited to 100 MB per file, and browser-first paths are limited by device memory.
- What happens to quality?
- Lossy AAC output reduces file size by discarding some audio information. Use the original master for further editing. Keep the source if you may need to adjust the conversion later.
- Where is the file processed?
- Yes. This conversion uses a server-side engine, so the file is uploaded over HTTPS, processed in an isolated request, and removed after the result is produced.
- How do I process a batch?
- Queue multiple files, run them together, and download the finished results as a ZIP. Each server file is limited to 100 MB, and large batches may take longer.
- What should I check before using the output?
- Open the downloaded AAC file in the application or database you plan to use, check the structure against the source, and keep the original until the output is approved.