MKV to MP4
Convert MKV video to MP4.
Trim options
Trim applies to every file in the queue. Leave blank to keep the full length. In remux mode, trimming snaps to the nearest keyframe for speed.
This free MKV to MP4 converter turns Matroska MKV video into MP4, which more players, phones, TVs and editors accept. There is no file-size limit and no queue, unlike server-based tools.
Two modes cover every case. Fast remux copies the existing video and audio streams straight into an MP4 container in seconds, with zero quality loss — the right choice when your MKV already holds an MP4-compatible codec such as H.264, H.265/HEVC or AV1 (the vast majority of files). If a stream is incompatible, switch tore-encode mode, which rebuilds the video as H.264 + AAC and adds full control over quality (CRF), resolution up to 4K, frame rate, rotation, volume and audio bitrate. Both modes support trimming and batch conversion, with a live preview, per-file download and a one-click ZIP of the whole batch.