How much smaller will my WMV files become?

Typically 40-60% smaller at matched visual quality, since VP9 is a far more efficient codec than WMV9. Lecture and screen-capture content compresses especially well, which is exactly the material most WMV archives contain.

Do old interlaced WMVs need special treatment?

Yes — interlaced sources must be deinterlaced during conversion, because VP9 stores progressive frames and combing would otherwise be baked in. Most screen recordings are already progressive; camera footage from the 2000s is the material to watch.

Can the result go straight into a web page?

That is the point: the WebM drops into an HTML5 video element and plays in every current browser, with no Silverlight or Windows Media plugin anywhere in sight. Adding an MP4 fallback source covers the few remaining legacy devices.

WMV to WEBM Converter – Free & Online

Convert WMV to WEBM

Turn WMV files into WEBM in seconds — free, secure, and no signup required.

Free tier: 5 conversions/day, files up to 50 MB, ad-supported. Need more? See Pro plans →

256-bit SSL encryptionYour files are protected end-to-end

Lightning-fast conversionsProcess files in seconds, not minutes

All major video formatsMP4, AVI, MOV, MKV & more

No registration requiredStart instantly — 5 free conversions a day

Files auto-deleted in 1 hourGDPR-friendly: we never keep your files

Modernizing WMV files into WebM re-encodes Windows Media video as royalty-free VP9 that every current browser plays natively. Old corporate and lecture content gets a second life on the web this way, usually at a fraction of the original size.

Convert WMV to WEBM – Free Online WMV to WEBM Converter

Why convert WMV to WEBM?

Re-publish archived training or lecture videos on an intranet or public site using plain HTML5 embeds.
Slash storage for a WMV archive — VP9 routinely halves file sizes at matching visual quality.
Remove the last dependency on Silverlight-era streaming plumbing in one migration pass.

Tip: Everything is re-encoded here (WMV9 to VP9, WMA to Opus), so batch large archives overnight and spot-check first — old interlaced WMVs need a deinterlace filter to avoid comb artifacts.

How to convert WMV to WEBM

Upload your WMV file using the area above.
WEBM is preselected as the target format.
Click Start and wait for the conversion to finish.
Download your converted WEBM file.

Convert WMV to WEBM

Convert WMV to WEBM – Free Online WMV to WEBM Converter

Why convert WMV to WEBM?

How to convert WMV to WEBM

WMV to WEBM — Frequently Asked Questions