MP3 to SPX Converter

Select files for conversion or just drag and drop them to the upload area

How to convert MP3 files to SPX online?

Step 1.

Upload MP3-file

Click "Choose File" button to select a mp3 file on your computer. MP3 file size can be up to 50 Mb.
Step 2.

Convert MP3 to SPX

Click "Convert" button to start conversion.
Step 3.

Download your SPX

When the conversion process is complete, you can download the SPX file.


  • ❓ How can I convert MP3 to SPX?
    First you need to add file for conversion: drag and drop your MP3 file or click the "Choose File" button. Then click the "Convert" button. When MP3 to SPX conversion is completed, you can download your SPX file.
  • ⏱️ How long does it take to convert MP3 to SPX?
    Audio conversion is pretty fast. You can change MP3 to SPX in a few seconds.
  • 🛡️ Is it safe to convert MP3 to SPX on AnyConv?
    Of course! We delete uploaded files immediately, and converted ones after 24 hours. No one has access to your files. File conversion (including MP3 to SPX) is absolutely safe.
  • 💻 Can I convert MP3 to SPX on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our MP3 to SPX converter works online and does not require software installation.

Information about MP3 and SPX file formats

Name MP3 SPX
Full name MP3 - MPEG-1 or MPEG-2 Audio Layer III Speex
File extension .mp3 .spx
MIME type audio/mpeg, audio/MPA, audio/mpa-robust audio/x-speex, audio/speex
Developed by Fraunhofer Institute Xiph.Org
Type of format Digital audio Audio
Description MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players. An SPX file is a Speex audio file saved within an Ogg Vorbis container. Speex is an open source patent-free audio format designed for speech compression. It supports variable bitrate (VBR) encoding and several features not found in other audio codecs. Some examples include embedded encoding, intensity stereo encoding, and voice activity detection.
Technical details The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source.
File conversion MP3 conversion SPX conversion
Associated programs VLC media player, MPlayer, Winamp, foobar2000. Apple QuickTime Player with XiphQT plugin, Foobar2000, Jajuk Advanced Jukebox, Microsoft Windows Media Player with DirectShow filter, Resco Audio Recorder, VLC media player