Convert MP4 to WEBM

MP4 → WEBM. Source file ≤ 2 GB · Output ≤ 1 GB.

MP4 is a video container, not a codec. Its actual video and audio codecs depend on the file. WebM uses VP8, VP9 or AV1 video and Opus or Vorbis audio here.

MP4 → WEBM: Example settings

60 s • VP9 4,000 kbps + Opus 192 kbps ≈ 31.44 MB

WEBM: 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.