MKV files from downloads and capture tools aren't supported by many phones, TVs and editors. Convert MKV to MP4 on your device; H.264 video is re-wrapped without any quality loss.
Drag & drop, click to browse, or paste
MP4, MOV, WebM, MKV
Runs fully in your browser. Your files are never uploaded.
Drop, paste or choose a MOV, MP4, WebM or MKV file. It stays on your device.
Pick MP4 for maximum compatibility or WebM for the web, and set the quality.
Conversion runs in your browser with hardware acceleration. Preview the result and save the file.
Your files are processed on your device and never uploaded to any server.
No account, no limits and no watermark on your results.
Runs at native speed in your browser and keeps working once the page has loaded.
You choose the settings - nothing is silently downscaled or recompressed.
Matroska (MKV) is a flexible container that many TVs, phones and editors do not support. MP4 is the format they all understand.
The main video and audio are kept. Subtitle tracks and chapters are not carried over into the MP4.
When the MKV contains H.264 video and AAC audio the streams are copied unchanged. Other codecs may be re-encoded so they fit into an MP4.
