Convert MKV to MP4
MKV is great for movies with multiple audio tracks and subtitles, but MP4 is the better choice for sharing video anywhere — phones, social media, web and TVs. Convert MKV to MP4 in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert MKV to MP4
- 1
Tap Choose files and select one or more MKV files (or drag them in).
- 2
Check that MP4 is selected. Use Advanced options for resolution, size or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your MP4 downloads automatically. Converting several files? Grab them all as a ZIP.
MKV vs MP4
MKV and MP4 can hold the same codecs, so in Smart mode the streams are copied — the conversion takes seconds and quality is identical to the original.
| MKV | MP4 | |
|---|---|---|
| Full name | Matroska Video | MPEG-4 Part 14 |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Developed by | Matroska.org | MPEG |
| Introduced | 2002 | 2001 |
| Plays on iPhone | ✕ No | ✓ Yes |
| Plays on Android | ◐ Partly / with an app | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ◐ Partly / with an app | ✓ Yes |
About MKV and MP4
MKV: MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks. It is popular for movies and anime but isn't supported by iPhone or most TVs out of the box.
MP4: MP4 is the universal video format. With H.264 video and AAC audio it plays on every iPhone, Android phone, smart TV, browser, WhatsApp, Instagram and YouTube.
Frequently asked questions
How do I convert MKV to MP4 on my phone?
Will converting MKV to MP4 reduce quality?
Is this MKV to MP4 converter free?
Are my files uploaded to a server?
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