SPX to GSM Converter
Convert your spx files to gsm online & free
GSM 06.10 Lossy Speech Compression
How to convert SPX to GSM
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to gsm"
Choose gsm or any other format you need as a result (more than 200 formats supported)
Download your gsm
Let the file convert and you can download your gsm file right afterwards