Convert WEBM to MKV

WEBM → MKV. Source file ≤ 2 GB · Output ≤ 1 GB.

WebM uses VP8, VP9 or AV1 video and Opus or Vorbis audio here. Matroska can hold several kinds of video and audio codecs.

WEBM → MKV: Example settings

60 s • H.264 4,000 kbps + AAC 192 kbps ≈ 31.44 MB

MKV: Output

Sizes are examples, not guarantees. Container overhead is extra; variable bitrate and image content change the result. Keep the original and compare the output.

JavaScript is required for file selection and processing.