Convert WEBM to MKV

Free, in your browser, no signup: files delete themselves within an hour.

Drop your file here to upload

WEBM MKV

Drop your WEBM here

Pick the video format you need: free, private, gone in an hour.
  • Free, no signup
  • No watermark, ever
  • Files auto-delete in 1 hour
  • Nothing to install

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

Most WEBM to MKV conversions are wrapper swaps: the pictures stay pictures, they just trade WEBM's box for one built for high-quality rips and archives with multiple audio and subtitle tracks. If the codec inside your WEBM is one MKV accepts, Flippy keeps quality bit-for-bit identical; if not, it re-encodes once, carefully, at matching quality.

Why flip WEBM to MKV

WEBM is video the way browsers like it: open, royalty-free and built to stream. It was born in 2010, Google, out of its VP8 acquisition, and its real weak spot is life outside the browser: editors, TVs and Apple devices get picky.

MKV is the format that hoards: video, a dozen audio tracks and every subtitle, all in one box. The Matroska container: it will hold practically any codec ever made. That makes it the right destination when what you need is high-quality rips and archives with multiple audio and subtitle tracks.

How to convert WEBM to MKV

  1. 1

    Drop your WEBM file into the flipper above, or click to browse for it.

  2. 2

    Check the output format: MKV is already selected for you.

  3. 3

    Hit Convert, give it a moment, then download your new MKV.

WEBM vs MKV, side by side

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

Questions people ask

Will converting WEBM to MKV 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 MKV file be bigger or smaller than my WEBM?

Similar, unless a re-encode is involved: then it depends on the codec. MKV typically runs as big as whatever you put inside: movie files often run to several gigabytes.

Where will the MKV file play?

VLC and desktop players love it; smart TVs, Apple devices and editors often don't. That's the usual reason people leave WEBM behind: MKV simply opens in more of the places that matter.

How long does WEBM to MKV 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

WEBM conversion Convert MKV Compress MKV MKV Trimmer Remove audio from MKV MKV to JPG Extract an image from WEBM

Related flips

WEBM to audio video to MKV WEBM to AVI WAV to MKV WEBM to FLAC WMA to MKV WEBM to FLV WMV to MKV