Matroska (MKV) → MP4 video
Convert Matroska (MKV) to MP4 video
Convert Matroska (MKV) (.mkv) to MP4 video (.mp4) right in your browser. Free and unlimited — your files never leave your device.
Drop a file — or click to browse
Drop a file anywhere, click to browse, or paste an image — files never leave your device.
Re-encodes to H.264 MP4 (runs locally; large files are slow).
The private way to turn Matroska (MKV) into MP4 video
Transcoded to MP4 with ffmpeg (when enabled). Pulls a still frame out of an MP4 video. With Morphr, the whole conversion runs inside your browser tab using your browser's built-in decoder — your file is never uploaded to a server, queued, or stored. That makes it a safe choice for personal photos, scanned documents and anything you'd rather not hand to a third party.
Frequently asked questions
- Is it free to convert Matroska (MKV) to MP4 video?
- Yes — Morphr is completely free, with no limits, watermarks, or sign-up.
- Are my files uploaded to a server?
- No. The conversion runs entirely in your browser, so your Matroska (MKV) file never leaves your device.
- What do I get converting Matroska (MKV) to MP4 video?
- A single still frame, saved as MP4 video. Morphr extracts the frame in your browser — it doesn't re-encode the video, so the audio and motion aren't included, just the picture.
- Is there a file size limit?
- Because everything runs locally, there is no upload limit — the practical ceiling is your device’s available memory.