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 WebM files.
WMV to WebM Conversion FAQ
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Branches on raster/vector, lossy/lossless, alpha-channel,
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What does the WMV to WEBM converter do?
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WMV is a legacy container, often poorly supported on modern devices. Converting to WEBM 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 WEBM?
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Yes. WMV → WEBM 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 WEBM?
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Yes. Legacy WMV files often fail to play in modern browsers and on iOS / Android. WEBM uses widely supported codecs that play natively on phones, tablets, smart TVs, and every modern browser.
Will the converted WEBM be a different size than the WMV?
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Modern codecs compress better, so WEBM from a legacy WMV is typically 30-60% smaller at equivalent quality. Conversions in the opposite direction can grow the file.
Is there a file-size limit when converting WMV to WEBM?
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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 WEBM 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 WEBM results. There is no need to repeat the upload step per file.
What happens to my WMV files after the conversion?
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Uploaded files and WEBM outputs are auto-deleted after a short retention window. We do not inspect, share, or train on user files. Direct download links are time-limited and tied to your session.
Will my WEBM play on phones, tablets, and TVs?
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Yes — WEBM uses modern codecs that play natively on iOS, Android, Smart TVs, game consoles, and every modern browser.
Do I need to install software to convert WMV to WEBM?
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No. The converter runs entirely in your browser plus our cloud — no plugin, no install, no admin rights. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.
Do I need an account to convert WMV to WEBM?
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No. WMV to WEBM conversion is free and works without an account. Signing in unlocks higher file-size caps, batch history, and API access.
Is there an API for WMV to WEBM conversion?
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Yes. Every conversion this site offers is also exposed via a JSON API — see /api/ for endpoints, authentication, and rate limits. WMV to WEBM is one of the supported pairs.
What if my WMV fails to convert to WEBM?
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Failures are usually caused by corrupted source files or unsupported WMV variants. Re-export from the original app and try again; if it still fails, the contact page forwards the file to support so we can diagnose.