CAF
→
SPX

Convert CAF to SPX Online

Convert CAF to SPX online. Start with free daily conversions, no install, no watermarks, and visible job status.

CAF to SPX Converter

Upload your CAF file to convert it to SPX format

Loading converter...

How to Convert CAF to SPX

Follow these simple steps

1

Step 1: Upload Your File

Upload your CAF file by dragging and dropping or clicking to browse

2

Step 2: Select Output Format

SPX is automatically selected as the output format

3

Step 3: Start Conversion

Click the Convert button to start the conversion

4

Step 4: Download Result

Download your converted SPX file when ready

Convert CAF to SPX - Complete Guide

Converting CAF to SPX stays in the audio file family but changes the traits that decide size, quality, transparency, editability, or device support. CAF is a audio format. Core Audio Format. SPX is a audio format. Speex audio. Below is what actually changes in a CAF→SPX conversion, what is preserved, and when SPX is the better choice than keeping CAF.

What changes when you convert CAF to SPX

  • The audio is re-encoded into the SPX format. Because re-encoding is not free, start from the highest-quality source you have and keep quality settings high.
  • Expect a smaller output file: SPX is typically more space-efficient than CAF for the same content.

About the CAF format

CAF (Core Audio Format) is Apple's flexible audio container that supports various audio codecs and features like unlimited file size.

  • Full name: Core Audio Format
  • Developer: Apple
  • Compression: mixed
  • Opens with: Logic Pro, GarageBand, QuickTime, FFmpeg

Where CAF is strong: Apple container that holds very large or long recordings; supports many codecs including uncompressed PCM; no practical file-size limit unlike WAV.

Typical CAF uses: macOS and iOS audio production, long-form recordings beyond WAV limits, Logic Pro and Core Audio workflows.

About the SPX format

SPX is a audio format. Speex audio.

  • Compression: lossy
  • Opens with: VLC, Audacity, FFmpeg

Where SPX is strong: open, royalty-free codec tuned for speech; very small files for voice; low latency for real-time use.

Typical SPX uses: voice over IP and recordings, spoken-word archives, low-bandwidth speech.

What SPX keeps

  • SPX adds: open, royalty-free codec tuned for speech.

Things to watch out for

  • One SPX limitation to keep in mind: poor quality for music.

When to convert CAF to SPX

  • Convert CAF to SPX for voice over IP and recordings.
  • Convert CAF to SPX for spoken-word archives.
  • Convert CAF to SPX for low-bandwidth speech.

CAF vs SPX — format comparison

A quick side-by-side of the structural differences between CAF and SPX, so you can confirm this is the right conversion for your file:

AttributeCAFSPX
TypeAudio fileAudio file
CompressionFlexible (lossy or lossless)Lossy
Web-friendlyNoNo
Typical file sizeLargeSmall
Best formacOS and iOS audio productionvoice over IP and recordings

Privacy & Security

Files are handled for the conversion you request. Uploads and downloads use HTTPS/TLS, and temporary files are cleared after the processing and deletion window.

Add this CAF to SPX converter to your site

Put a working CAF to SPX converter on your own blog or website — free to embed. Both options below include a small link back to FreeFastConverter.

Embeddable widget (iframe)

Paste this where you want a live converter. Visitors can convert CAF to SPX without leaving your page:

Widget Embed Codeiframe

Simple link badge

Prefer a lightweight button instead? Copy this HTML badge:

HTML Badge CodeLink

Need the opposite conversion?

Convert SPX to CAF

Other CAF Conversions

More formats you can convert CAF to

Convert CAF to MP3Convert CAF to WAVConvert CAF to AACConvert CAF to OGGConvert CAF to FLACConvert CAF to M4AConvert CAF to WMAConvert CAF to AIFFConvert CAF to OPUSConvert CAF to AC3Convert CAF to AMRConvert CAF to AUConvert CAF to MKAConvert CAF to WVConvert CAF to OGAConvert CAF to DTSConvert CAF to MP2
View all CAF conversions →

Convert to SPX

Other formats you can convert to SPX

Convert MP3 to SPXConvert WAV to SPXConvert AAC to SPXConvert OGG to SPXConvert FLAC to SPXConvert M4A to SPXConvert WMA to SPXConvert AIFF to SPXConvert OPUS to SPXConvert AC3 to SPXConvert AMR to SPXConvert AU to SPXConvert MKA to SPXConvert WV to SPXConvert OGA to SPXConvert DTS to SPXConvert MP2 to SPX
View all SPX conversions →

CAF to SPX FAQ

Converting CAF to SPX preserves the content faithfully; output also depends on the source file and any settings you choose.
Upload your CAF file, confirm SPX as the output format, and click Convert. Job status is shown while the file is processed, then you can download the SPX result.
Yes. You can start with free daily conversions, with no signup required for your first jobs and no watermarks on the output. Accounts and paid plans are available for higher-volume work.
No. The CAF to SPX conversion runs in your browser on any device — Windows, Mac, Linux, iOS, or Android — with uploads and downloads over HTTPS.
CAF (Core Audio Format) is an audio file format. CAF files can be played with various audio players and media applications.
Upload your CAF audio file to the converter, select your desired output format, and click Convert. The job status appears while the audio is processed.
You can start with free daily conversions. Accounts and paid plans are available for higher-volume work, and downloaded files are not watermarked.
You can convert CAF to proof-backed audio outputs such as MP3, WAV, AAC, OGG, FLAC, M4A, WMA, AIFF, OPUS, AC3, AMR, AU, CAF, MKA, WV, SPX, OGA, DTS, and MP2 when the source format is public-supported.
Yes! Our CAF converter works on any device including smartphones and tablets.
Choose the bitrate or output setting that fits your file-size and playback needs. Lossy formats can reduce detail compared with the source.

Related tools

Convert CAF to SPX Now

Start with 10 free daily conversions. No signup required for your first file jobs.

Convert Now