Convert MKV to MP4
Turn MKV files — OBS recordings, archives, downloads — into MP4s that phones, TVs, and editors actually accept.
This tool uploads the video over TLS and runs transcoding as a background server job. Sign in before selecting a file; retained copies expire on your plan’s schedule.
Video compression runs on secure servers.
Full video re-encoding uploads over TLS and runs as a background server job for videos up to 20 minutes. Workspace access to server-processed inputs and outputs expires after 7 days on free accounts and no later than 30 days on paid plans. Download URLs expire no later than that access boundary. Expired objects are queued for automatic cleanup, and deletion is retried if storage removal fails. A free account includes 10 server jobs per month with no card required.
Need more? A 1-day pass starts at $3, with no subscription. See plans
source file to finished file, step by step.
These steps describe the source file input and the finished file export for this exact route.
Upload your MKV video
Drop the MKV file in — anything up to 20 minutes long, sized to your plan's upload limit.
Pick format and quality
MP4 is preselected; choose high, standard, or small-file output before starting the conversion.
Download the MP4
The background server job re-encodes your video and returns a download link. Workspace access to encrypted retained server objects expires on your plan’s schedule. Expired objects are queued for automatic cleanup, and deletion is retried if storage removal fails.
What to expect
What matters for finished file output.
Review the behavior this source file to finished file tool is designed to preserve, expose, or simplify.
Secure Server Transcode
Re-encoding is heavy work, so it runs as a background server job after a TLS upload. Workspace access to encrypted retained server objects expires on your plan’s schedule. Expired objects are queued for automatic cleanup, and deletion is retried if storage removal fails.
Plays Everywhere
MP4 with H.264 video and AAC audio is the most widely supported video format there is — phones, TVs, editors, social uploads, and every browser.
Quality Presets
Pick high, standard, or small-file output — the encoder balances visual quality against file size for you.
Questions about source file and finished file.
Check the format behavior, limitations, and follow-up options before processing a real file.
MKV (Matroska) is a superb archival container — OBS records to it by default because it survives crashes — but device and editor support is thin: iPhones won't play it, many smart TVs skip it, and some editing suites refuse to import it. Converting to MP4 re-encodes the streams into the H.264/AAC combination that everything accepts, turning an archive format into a sharing format.
Related routes
Continue from finished file.
Choose another format only when it matches the next job.
Next step
Ready to process another source file file?
Start here again, or compare plans when the job needs server capacity, retention, or repeat automation.