MP3 to SPX Converter

Batch convert mp3 files to spx format online for free

Choose files or drag & drop them here.
Only you have access to your files.
All files will be deleted after one hour.

How to convert MP3 files to SPX online?

Step-by-step guide to convert mp3 to spx using AnyConv. It works on PC (Windows, Mac, Linux) and mobile devices (iPhone, Android).

Upload MP3-file

Drag and drop your MP3 file into the upload area. The maximum file size is 100 MB.

MP3 to SPX

Click "Convert" to change mp3 to spx. The conversion usually takes a few seconds.

Download your SPX

Now you can download the SPX file. The download link only works on your device.


  • ❓ How can I convert files from 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 1 hour. 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

🔸 File format 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 that uses lossy data compression. It is a common audio format for consumer audio streaming or storage and 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 Lossy compression is designed to reduce significantly the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. For example, an MP3 file created using the setting of 128 kbit/s will result in a file 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
🔸 Wiki
MP3 to SPX Conversion Quality Rating
4.6 (384 votes)
Convert and download at least one file to rate.