Step 1: Supply your WMV files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted MP4 files.
WMV to MP4 Conversion FAQ
What does the WMV to MP4 converter do?
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WMV is a legacy container, often poorly supported on modern devices. Converting to MP4 rewraps the video with a current codec (H.264 / H.265 / VP9) for broad browser, phone, and TV compatibility.
Will resolution and frame rate be preserved in the MP4?
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Yes. WMV → MP4 keeps resolution, frame rate, and aspect ratio unchanged by default. To change them, use the Resize or Speed tool on the result.
Will the WMV play smoothly on modern devices after converting to MP4?
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Yes. Legacy WMV files often fail to play in modern browsers and on iOS / Android. MP4 uses widely supported codecs that play natively on phones, tablets, smart TVs, and every modern browser.
Will the converted MP4 be a different size than the WMV?
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Modern codecs compress better, so MP4 from a legacy WMV is typically 30-60% smaller at equivalent quality. Conversions in the opposite direction can grow the file.
My WMV footage shows comb lines on movement — will that carry into the MP4?
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It will unless you deinterlace, and WMV content very often is interlaced because the format comes from the broadcast and DVD era. Interlaced frames store two half-height fields captured a fiftieth of a second apart; on a progressive-scan phone or monitor that reads as horizontal combing on anything that moves. Turn on the deinterlace option and the encoder weaves the fields into whole progressive frames before writing the MP4. WMV is Windows Media Video, Microsoft’s ASF-based format from the Windows XP era.
Can I add selectable subtitles once the file is MP4?
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Yes. WMV has no usable soft-subtitle track, so subtitles for WMV content had to be burned into the picture or shipped as a separate sidecar file. MP4 carries subtitles as their own selectable stream, so after conversion you can attach an SRT track the viewer can switch on, switch off or restyle. Almost every MP4 in the wild is H.264 video with AAC audio; the container also legally holds HEVC, AV1 and VP9.
Will the MP4 play on a phone without anything installed?
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That is the whole argument for it. MP4 is what phones record to and what every phone, tablet, console, television and browser built in the last decade decodes in hardware, so a file in it opens on whatever the recipient happens to own. Hardware decoding is the part people underestimate: it is why an hour of video plays on a phone without draining the battery, and why nothing else is a safer choice when you do not know what the file will land on. MP4 is the safest possible delivery target — every phone, browser, console, editor and Smart TV built in the last decade plays it without extra software.
Will the text in my WMV screen recording still be readable as MP4?
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It will if you keep the resolution and raise the quality. Screen content is the hardest thing to compress well — large flat areas with hairline-thin text over them — and the default settings on any encoder are tuned for camera footage, where a little smearing is invisible. Scaling a recording down is what actually destroys the text, far more than the codec does, so encode at the captured resolution and let the file be larger than you expected.
Why does my WMV file fail to convert to MP4?
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Almost always DRM. Some WMV files are encrypted at the bitstream level by the store or software that issued them, and an encrypted stream cannot be decoded by us or by anything else without the licence key. Files you recorded, exported or downloaded unprotected convert normally; a licensed purchase will not, and no converter can honestly promise otherwise. WMV is effectively a dead end: macOS, iOS, Android and every browser need third-party decoders, and some WMV files carry DRM that cannot be converted at all.
Will the MP4 play in a browser when the WMV would not?
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Yes, and that is usually the whole reason for the conversion. A WMV embedded in a web page either shows a broken player or forces a download, because browsers ship no decoder for it. MP4 plays inline through the native HTML5 video element with no plugin and no external application.
Is there a file-size limit when converting WMV to MP4?
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Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several WMV files to MP4 at once?
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Yes. Drop or pick multiple WMV files in one upload — the converter processes them in parallel and returns a ZIP of the MP4 results. There is no need to repeat the upload step per file.
