WAV to GSM Converter
Encode WAV recordings in GSM telephony codec online
Telephony Codec
GSM 06.10 is the foundation of mobile telephony — convert your WAV recordings for direct use in PBX, IVR, and VoIP systems.
Extreme Compression
GSM shrinks WAV files by over 99% — a full minute of voice audio fits in about 96 KB.
Web-Based Tool
Convert WAV to GSM from any browser — no Asterisk installation or command-line SoX usage required.
How to convert WAV to GSM
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose gsm or any other format you need as a result (more than 200 formats supported)
Let the file convert and you can download your gsm file right afterwards
About formats
Frequently Asked Questions
GSM 06.10 is the standard speech codec for mobile telephony and VoIP. Asterisk PBX systems and IVR platforms frequently require GSM-encoded audio.
VLC, Audacity, SoX, and telephony platforms like Asterisk and FreeSWITCH decode GSM audio natively.
Dramatically — GSM compresses audio to about 1.6 KB per second. A WAV file that is 10 MB becomes roughly 100 KB in GSM.
No. GSM is designed for speech at 13 kbps. Music loses most of its quality when encoded with this codec.
Upload all your WAV voice prompts and batch-convert them to GSM — efficient for setting up a phone system.