Convert WMV to MP4, Free
Upload your WMV file and get a MP4 in seconds. No account, no watermark.
How to convert WMV to MP4
WMV (Windows Media Video) is Microsoft's proprietary video format. While WMV plays in Windows Media Player on Windows, it is not supported on macOS, iOS, Android, or most smart TVs without extra software. Converting WMV to MP4 produces a file that plays everywhere natively.
BoltConverter converts your WMV file to H.264 MP4 on its servers. The Windows Media Video codec is decoded and re-encoded to the widely compatible H.264 format. The resulting MP4 works with any modern device, browser, or video editing application.
Upload your WMV file
Click the upload area or drag your .wmv file onto the page.
Re-encoding runs on the server
The Windows Media Video codec is decoded and the video is re-encoded as H.264 MP4.
Download the MP4
Save the MP4. It plays natively on any device, including Mac, iPhone, Android, and smart TVs.
Frequently asked questions
Why does WMV not play on my Mac or iPhone?
WMV uses Microsoft's proprietary codec, which is not installed on Apple devices by default. Converting to MP4 (H.264) uses a codec that is universally supported.
Will converting WMV to MP4 reduce quality?
Re-encoding involves some quality trade-off. At typical WMV quality levels, the difference in the MP4 output is generally not noticeable for most content.
Can I upload WMV files to YouTube?
YouTube accepts WMV uploads, but H.264 MP4 is the recommended format. Converting first gives you more control over the output quality.
What is the maximum file size for WMV uploads?
The file size limit is shown on the upload page. WMV files for typical video content are usually well within this limit.
Does the converter preserve the original audio track?
Yes. The Windows Media Audio (WMA) track is decoded and re-encoded as AAC in the MP4 container.