Convert WebM video to MP4 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.
WebM probe and decode → stream-aware conversion → MP4 verify
WebM input accepts approved VP8, VP9, or input-only AV1 profiles with compatible WebM streams.
MP4 output uses the approved H.264/AAC profile after its distribution rights and browser encoder are approved.