Converting MKV to WebM repackages your video from the MKV container into WebM. The video is re-encoded to a codec the WebM container supports, with the Quality, Resolution, Codec and Frame Rate settings on the page.
Why would I convert MKV to WebM?
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You move your content from the MKV format into WebM so it works in the apps, devices or workflows that prefer WebM.
Will converting MKV to WebM reduce quality?
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The video is re-encoded, which costs a small amount of quality. High Quality under Quality keeps the most detail; Smaller File gives the smallest output.
How long does a MKV to WebM conversion take?
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It depends on the size and length of the file. Small documents and images are usually ready quickly. Long videos take the longest, because most video conversions re-encode every frame.
Which WebM settings should I choose?
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MP4 with H.264 is the safest, most universal WebM-family target. Use WebM for web embedding and MOV for Apple editing pipelines.
Is the MKV to WebM converter free?
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Yes. One conversion an hour is free, with no account needed, for a file within the free size limit. A paid plan removes the hourly limit and the size limit, and lets you add several files to one job.
How large a MKV file can I convert to WebM?
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Free conversions have a size limit per file, set by the type of file, and the page tells you when a file is over it. A paid plan removes that limit, so much larger files can be converted.
Can I convert several MKV files to WebM at once?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
Do I need to install any software to convert MKV to WebM?
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No. The MKV to WebM conversion runs on our servers, so nothing needs installing: upload in the browser, convert, download.
Can I convert MKV to WebM on my phone?
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Yes. WEBM.to runs in any modern mobile browser, so iPhone, iPad and Android users can convert MKV to WebM without an app. The WebM result downloads straight to your device.
Are my MKV files kept private during conversion?
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Uploaded files are processed on our own conversion servers, nobody looks at them, and they are not shared. The upload and the converted file are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
Do I need an account to convert MKV to WebM?
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No account is required for basic MKV to WebM conversions — you can convert immediately. A paid plan removes the hourly limit and the size limit and allows several files in one job.
