MKV to MP4 Converter
Convert MKV videos to MP4 for universal playback. Transform Matroska video files to work on any device or platform.
MKV vs MP4: Technical Overview
Why Convert MKV to MP4?
MKV files often won't play on iPhones, iPads, Apple TV, some smart TVs and game consoles, in QuickTime, or in editors like iMovie and older Premiere versions, and social platforms often reject them. OBS Studio records to MKV by default because it survives crashes, so streamers and creators routinely need MP4 copies for editing and uploading.
Converting to H.264/AAC MP4 also resolves audio problems caused by codecs like DTS or AC-3 that some TVs and phones can't decode, a common cause of "video plays but there's no sound". It's the simplest way to make a mixed collection of MKV files play reliably on every device in the house.
What Changes During MKV to MP4 Conversion
MKV vs MP4: Key Differences
| Feature | MKV | MP4 |
|---|---|---|
| Container | Matroska (open, very flexible) | MP4 (ISO standard) |
| Video codecs | Anything (H.264, HEVC, VP9, AV1…) | H.264 |
| Audio codecs | Anything (AAC, AC-3, DTS, FLAC…) | AAC |
| Multiple audio and subtitle tracks | Yes | One audio track, no subtitles |
| Plays on Apple devices and most TVs | Often not | Yes |
| Accepted by social platforms | Rarely | Universally |
When to Convert MKV to MP4
Editing OBS Studio recordings in Premiere, DaVinci Resolve, iMovie or Final Cut
Uploading MKV recordings to YouTube, Instagram, TikTok or LinkedIn
Playing MKV files on iPhone, iPad, Apple TV and smart TVs
Fixing MKVs that play without sound on TVs because of DTS or AC-3 audio
Sharing videos with people who don't have VLC
Importing clips into presentations and web pages
How to Convert MKV to MP4
- Click 'Select File' and choose your MKV video
- Our system prepares the video
- Click 'Convert to MP4' button
- Wait for the conversion to complete
- Download your MP4 video
Processing typically takes a few seconds. For larger files, conversion may take slightly longer. All conversions are free with no daily limits.
Tips for Best MKV to MP4 Results
- 1.In OBS, you can also set Settings › Advanced › Automatically remux to MP4 for future recordings.
- 2.If you need a specific language track, remove the others with a tool like MKVToolNix before converting, since one audio track is kept.
- 3.Subtitles aren't carried over; export them as an SRT file if you need them alongside the MP4.
- 4.Large MKVs take longer to upload and convert; the limit is 500 MB per file.
Benefits of Converting MKV to MP4
- Universal video compatibility
- Works on all devices and TVs
- Maintain video quality
- Fast and easy conversion
- No signup required
MKV to MP4 — Frequently Asked Questions
Why won't my MKV play on my iPhone or TV?
Many devices don't support the MKV container or codecs inside it, like HEVC, DTS or AC-3. An H.264/AAC MP4 plays almost everywhere.
Is the video quality preserved?
It's re-encoded at a high-quality setting with the same resolution and frame rate, so it looks the same at normal viewing.
What happens to multiple audio tracks and subtitles?
One audio track is kept (the one with the most channels) and subtitle tracks aren't included.
Can I convert OBS recordings?
Yes. OBS MKV recordings convert to MP4 that you can edit and upload anywhere.
Why does conversion take a while?
The video is fully re-encoded to guarantee compatibility, which takes longer than simply changing the container.
Quality & Security
Secure Conversion
Files are encrypted during transfer and automatically deleted within 60 minutes.
Fast Processing
Optimized servers process your MKV to MP4 conversion in seconds.
High Quality
Advanced algorithms maintain the highest possible output quality.
Convert to MP4 from Other Formats