WebM to WMV - Online Video Converter

Convert WebM to WMV online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert WebM to WMV

[+] Drop WebM video here or click to select WebM

Output format

WMV (WMV2 / WMA)

No transcoding (remux only)[i]

Mode[i]

Simple Advanced

Quality[i]

Resolution[i]

About WebM to WMV

Convert WebM to WMV. WebM pairs VP9 video with Opus audio and supports an alpha channel. WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper. Protected store files cannot be converted; use DRM-free sources..

Why convert WebM to WMV?

Smaller files with WMV lossy compression.
Keep animation and transparency where supported.
Private, no upload - runs in your browser.

WebM vs WMV

Animation	Yes	Yes
Transparency	Yes	No
Compression	lossy	lossy
Typical use	WebM pairs VP9 video with Opus audio and supports an alpha channel.	WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper.

When not to convert WebM to WMV

Skip WMV for archival masters: lossy compression discards detail, so keep the WebM original.
Flatten transparency first: WMV has no alpha channel, so composite WebM over a background color.

Limits

Starting point: WebM - VP9 video with Opus audio and alpha support. Apple editors accept it unevenly; keep MP4 for editing round-trips. Protected store files cannot be converted; use DRM-free sources. Encode WMV (WMV2 / WMA) from WebM at a bitrate near the source, and confirm the audio track before converting.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert WebM to WMV?

Drop your WebM file onto this page, choose quality and codec settings, then click Convert. The result downloads as WMV instantly. All processing runs in your browser.

What codec is used for WMV?

The default codec for WMV is WMV2 / WMA. You can change the video and audio codec in Advanced mode.

How do you store my files?

We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.