Convert MKV to WEBM

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Converting MKV to WEBM is free: drop your MKV above, hit convert, and download the WEBM. Files delete themselves within an hour.

Most MKV to WEBM conversions are wrapper swaps: the pictures stay pictures, they just trade MKV's box for one built for embedding on the web without licensing worries. If the codec inside your MKV is one WEBM accepts, Flippy keeps quality bit-for-bit identical; if not, it re-encodes once, carefully, at matching quality.

Why flip MKV to WEBM

MKV is the format that hoards: video, a dozen audio tracks and every subtitle, all in one box. It was born in 2002, the open-source Matroska project, and its real weak spot is playing on TVs, iPhones and editors that never learned to open the box.

WEBM is video the way browsers like it: open, royalty-free and built to stream. A Matroska-based container restricted to VP8/VP9/AV1 video with Vorbis or Opus audio. That makes it the right destination when what you need is embedding on the web without licensing worries.

How to convert MKV to WEBM

1
Drop your MKV file into the flipper above, or click to browse for it.
2
Check the output format: WEBM is already selected for you.
3
Hit Convert, give it a moment, then download your new WEBM.

MKV vs WEBM, side by side

	MKV	WEBM
Born	2002, the open-source Matroska project	2010, Google, out of its VP8 acquisition
Type	video · container	video · container
Best for	high-quality rips and archives with multiple audio and subtitle tracks	embedding on the web without licensing worries
Weak spot	playing on TVs, iPhones and editors that never learned to open the box	life outside the browser: editors, TVs and Apple devices get picky
Typical size	as big as whatever you put inside: movie files often run to several gigabytes	often smaller than the equivalent MP4: VP9 and AV1 squeeze harder than H.264
Plays on	VLC and desktop players love it; smart TVs, Apple devices and editors often don't.	Every modern browser; hit-and-miss in editing apps and on Apple hardware.

Questions people ask

Will converting MKV to WEBM lose quality?

Usually not: when the video codec is compatible, Flippy swaps the container without re-encoding, so quality is untouched. If a re-encode is needed, it happens once at matching quality.

Will the WEBM file be bigger or smaller than my MKV?

Similar, unless a re-encode is involved: then it depends on the codec. WEBM typically runs often smaller than the equivalent MP4: VP9 and AV1 squeeze harder than H.264.

Where will the WEBM file play?

Every modern browser; hit-and-miss in editing apps and on Apple hardware. That's the usual reason people leave MKV behind: WEBM simply opens in more of the places that matter.

How long does MKV to WEBM conversion take?

When it's a pure container swap it's nearly instant, since nothing is re-encoded. Full re-encodes take roughly as long as the video plays, often less.

More ways to handle these formats

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