Video ToolsFree

WMV to MP4

Convert Windows Media Video (WMV) files to MP4 format for cross-platform compatibility. WMV is Microsoft's proprietary codec — it doesn't play natively on Mac, iPhone, iPad, Android, or Linux. MP4 works on all platforms. No signup required.

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MP4, MOV, AVI, MKV, WebM, FLV, WMV, VOB

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Frequently Asked Questions

Why doesn't WMV play on Mac or iPhone?▼
WMV uses Microsoft's proprietary Windows Media codec (VC-1 or WMV3), which is not supported by macOS, iOS, or Android without third-party software. MP4 with H.264 is the universal alternative.
Is audio preserved converting WMV to MP4?▼
Yes. WMV audio (Windows Media Audio / WMA) is converted to AAC in the MP4 output — the standard audio codec for MP4 files.
What WMV versions are supported?▼
WMV9 (Windows Media Video 9), WMV8, WMV7, and VC-1 variants are all handled by FFmpeg's built-in WMV decoder.
Will video quality be maintained?▼
Yes. Default settings encode to H.264 at quality matching the source WMV.
Is the conversion done in the browser?▼
Yes. FFmpeg WebAssembly handles WMV decoding and MP4 encoding locally. No file is uploaded.