MKV to MP4
Convert MKV (Matroska) video files to MP4 format for broader device compatibility. MKV is excellent for archiving but isn't supported natively on iPhone, Apple TV, or many Smart TVs. MP4 works everywhere. Video stream is copied without re-encoding when possible. No signup.
Updated June 2026
- 1Upload your MKV video
- 2Conversion runs instantly
- 3Download your MP4 file
Drop your video anywhere, click to browse
MP4, MOV, AVI, MKV, WebM, FLV, WMV, VOB
How to Use MKV to MP4
- 1
Upload your MKV video
Drag and drop your MKV file into the upload area, or click to browse and select it from your device. Nothing is sent to a server.
- 2
Conversion runs instantly
ToolBubble converts the video to MP4 directly in your browser — no waiting in an upload queue.
- 3
Download your MP4 file
Once processing finishes, the converted MP4 file downloads automatically to your device.
Frequently Asked Questions
Is video quality lost converting MKV to MP4?▼
Are subtitles preserved in the MP4 output?▼
Are multiple audio tracks preserved?▼
Why doesn't MKV play on iPhone or Apple TV?▼
Is the conversion done in the browser?▼
How to use MKV to MP4
- 1
Upload your MKV video
Drag and drop your MKV file into the upload area, or click to browse and select it from your device. Nothing is sent to a server.
- 2
Conversion runs instantly
ToolBubble converts the video to MP4 directly in your browser — no waiting in an upload queue.
- 3
Download your MP4 file
Once processing finishes, the converted MP4 file downloads automatically to your device.
Frequently asked questions
Everything you need to know about mkv to mp4.
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