Convert MKV video to WebM in a browser-only batch. Files, streams, metadata, and results are never uploaded.
Files stay in this browser tab and are never uploaded. Up to 250.0 MiB per file and 10 files.
Lower CRF values preserve more detail and usually create larger files.
The private batch workspace is ready. Video encoding becomes available after the verified browser engine is loaded.
MKV probe and decode → stream-aware conversion → WebM verify
MKV input can carry several stream types, so codecs, tracks, chapters, subtitles, and attachments are inspected explicitly.
WebM output uses VP9 video and Opus audio with only verified WebM-compatible streams.