Audio tool

Convert Speex Files to MP3 on Your Device

Make a MP3 copy of Speex in your browser for easy sharing. The Speex source remains on this device while the browser prepares MP3.

Route SPX → MP3

or drop here · up to 500 MB

Max 50 MB per file

Preview (optional)

When your browser supports it, your audio plays here. You can still convert your file if preview does not load.

Ready

Use upload name

Adapt speech-focused compression to a workflow built for easy sharing
Supply MP3 when an editor, player, or delivery form will not accept Speex
Create a MP3 copy from Speex for phones, websites, podcasts, and universal playback

Local conversion competes with other open apps for processor time during this Speex-to-MP3 job.
Large Speex inputs may take several minutes on older hardware.
Review the beginning and end of MP3 after the download finishes.

MP3 serves phones, websites, podcasts, and universal playback, whereas Speex commonly serves legacy voice chat and speech archives.
For Speex-to-MP3 delivery, plan for quality loss from further lossy encoding.
After leaving Speex, the receiving app must support the streams encoded inside MP3, not only its extension.

Speex to MP3 taking too long? Check available memory; long, high-resolution sources need substantially more.
MP3 converted from Speex not opening? Test a compatible player and inspect the output streams.
Check whether the receiver supports this MP3 variant: quality loss from further lossy encoding.

When does Speex to MP3 conversion make sense?

It is useful when Speex media created for speech-focused compression must enter a MP3 system designed for easy sharing.

Where is the Speex source processed?

The browser prepares MP3 from Speex on this device instead of sending the source to a remote conversion server.

How can I approve MP3 converted from Speex?

Test the MP3 file in the receiving app and compare duration, channels and loudness with the Speex source.

Quick use cases