How to convert MKV to MP4
Follow these steps to convert MKV to MP4:
- Add one or more MKV files — drag and drop them or click to browse.
- Click Convert to MP4 and let the conversion run in your browser.
- Download your new MP4 files individually or as a batch.
What is MKV?
MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks in one file. It is popular for high-quality movies and archived video, but is not supported natively by browsers or many mobile devices.
What is MP4?
MP4 is the most widely compatible video format in the world. Using efficient H.264 compression, it balances small file sizes with good quality and plays on virtually every device, browser and platform — making it the safe default for sharing video.
MKV vs MP4: how they compare
Before converting, it helps to know how MKV and MP4 stack up. The table below breaks it down.
| MKV | MP4 | |
|---|---|---|
| Format type | Video | Video |
| Compression | Container (any codec) | Lossy (H.264/H.265) |
| Quality | Lossy | Lossy |
| Best for | High-quality movie storage | Sharing video anywhere |
Why convert MKV to MP4?
The usual reason to turn MKV into MP4 is compatibility: MP4 is the right fit for sharing video anywhere and web and social media.
What MP4 gives you: plays on virtually every device, good quality-to-size ratio and universal browser support.
Where MKV falls short: no native browser support, poor mobile compatibility and large files. Converting keeps your content while moving to a format that matches where the file is going.
Tips for the best results
- You can convert several files in one go — add as many MKV files as you like and download them together.
- Everything runs locally in your browser, so even large files convert quickly and nothing is uploaded.
MKV to MP4 — frequently asked questions
- How do I convert MKV to MP4?
- Add your MKV file, click Convert to MP4, and download the MP4 result. The whole process happens in your browser and takes just a few seconds.
- Is it free to convert MKV to MP4?
- Yes. This MKV to MP4 converter is completely free with no sign-up, no watermarks and no limit on the number of files you can convert.
- Are my MKV files uploaded to a server?
- No. Conversion runs entirely on your device using your browser, so your files never leave your computer or phone.
- Will I lose quality converting MKV to MP4?
- MP4 uses lossy compression, so a small amount of detail is discarded to keep the file size down. At normal quality settings the difference is hard to notice. Keep your original MKV if you need an exact copy.
- Can I convert multiple MKV files at once?
- Yes. Add as many MKV files as you like and convert them in a single batch, then download each MP4 result.