Convert MKV to MP4
Turn MKV files — OBS recordings, archives, downloads — into MP4s that phones, TVs, and editors actually accept.
Free workspace
Keep repeat file work in motion after the first export.
Start here without an account, then move into retained files, OCR, and starter workflows when the task stops being a one-off.
Instant use
25 browser conversions / day
Retained files
7-day retained files
Secure processing
10 server jobs / month
Document tools
20 OCR pages / month
Need more just this week? $5 Week Pass — 7 days of Pro, no subscription.
Conversion surface
Run the file task now.
The converter stays fast and simple. Workspace features only step in when retention, OCR, or repeat work actually adds value.
How it works
A short path from input to finished export.
The flow stays simple so you can get in, finish the job, and move on without extra setup.
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 isolated server job re-encodes your video and hands back a download link; the uploaded file is deleted automatically.
Why FileMorf
A cleaner route for this conversion.
The tool keeps the core job lightweight while still giving you room to grow into retained, higher-value workflows later.
Secure Server Transcode
Re-encoding is heavy work, so it runs in an isolated server job over TLS — and your files are deleted automatically after processing.
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.
Details
Answers before you start.
The important questions, plus the nearby routes users usually need next.
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.
Yes — unlike FileMorf's in-browser tools, full video re-encoding needs server horsepower. Your MKV uploads over TLS into an isolated job and is deleted automatically after processing. A free account includes monthly server jobs — no card required.
Videos up to 20 minutes. Upload size follows your plan: 10MB on free accounts, 100MB on Pro, and 500MB on Enterprise. A one-time Week Pass also unlocks the 100MB limit for 7 days.
Conversion re-encodes the video, so there is a generational step — but the presets are tuned so "High" is visually indistinguishable for typical footage. If your source is already heavily compressed, "Standard" usually looks identical at a smaller size.
Related routes
Keep moving through adjacent file work.
These are the next conversion paths people usually need after this one.
Next step
Convert now. Create a workspace when the job starts repeating.
Keep quick work frictionless, then move into retained files, document tools, and secure processing when that actually improves the workflow.