Convert MKV to MP4
Free and instant — your MKV files are processed securely on our servers and deleted right after conversion. Nothing is stored.
How to convert MKV to MP4
- Step 01
Add your MKV files
Drop them into the box above or click to browse. You can add several files at once.
- Step 02
Conversion starts instantly
Your file is sent to our servers, converted and deleted right away — no sign-up, no queue, no waiting.
- Step 03
Download your MP4 files
Save each file individually or grab them all at once. Done.
Why convert MKV to MP4?
MKV is a great container for movies and TV shows with multiple audio and subtitle tracks, but most phones and smart TVs can't play it. Converting to MP4 makes your video compatible with every device while keeping the same quality.
MKV vs MP4 at a glance
MKV is the flexible open container — can hold almost any codec, multiple audio tracks and embedded subtitles, but browser support is limited. MP4 is the universal video format — plays on every device, browser and platform without extra codecs.
| Property | MKV | MP4 |
|---|---|---|
| Extension | .mkv | .mp4 |
| Full name | Matroska Video | MPEG-4 Part 14 |
| First released | 2002 | 2001 |
| Developed by | Matroska project | ISO/IEC JTC 1 |
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | No | No |
| Best for | high-quality video with multiple audio tracks and subtitles | video sharing, streaming and playback on any device |
MKV to MP4 — frequently asked questions
Is this MKV to MP4 converter really free?
Yes — completely free, with no sign-up, no watermarks and no daily limits.
Will I lose quality converting to MP4?
MP4 uses lossy compression, so the image is re-encoded at high quality (92%). For photos the difference is practically invisible; for text-heavy graphics or logos, a lossless format like PNG preserves sharp edges better.
Are subtitles kept?
MP4 supports embedded subtitle tracks, so they are preserved where possible. Burned-in subtitles are always kept.
Is the conversion private?
Video conversion runs on our servers with ffmpeg — your file is deleted immediately and never stored.
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