Convert ASF to 3GP — Free Online Converter

ASF (Advanced Systems Format) is Microsoft's proprietary streaming container, designed for Windows Media Server deployments and early internet video delivery. 3GP is the GSM mobile video standard using H.263 or H.264 video with AMR or AAC audio, built for bandwidth-constrained cellular networks. Converting ASF to 3GP re-encodes the Windows Media codecs (WMV/WMA) into mobile-optimized codecs at reduced resolution, enabling playback on feature phones and legacy Android devices that lack Windows Media support.

Feature phones and older smartphones natively support 3GP but cannot decode Windows Media codecs found inside ASF containers. Converting eliminates the need for third-party media players on mobile devices. 3GP files are also significantly smaller due to aggressive compression, making them practical for MMS sharing and storage on devices with limited memory. If you have ASF recordings from a Windows Media Server or legacy webcam, 3GP conversion is the fastest path to mobile compatibility.