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Convert MKV files that won't open on your TV or smartphone into MP4, so you can play and share them anywhere.
Drag and drop your MKV file here, or click to upload
MKV files supported
MKV files can contain subtitles, multiple audio tracks, and more in a single file, making them popular for movies and TV series. However, they often cannot be played directly on smart TVs or smartphones.
MP4 is a universally supported format across almost all environments, including smart TVs, iPhones, Android phones, Windows, and Mac. It plays without needing a separate app.
If a downloaded video shows 'unsupported format' on your smart TV or won't open on your smartphone, converting it to MP4 will solve the problem. MP4 is also the most reliable format for playing videos from a USB on your TV or sending them via messenger.
The entire conversion process is handled in your browser. Your file is never sent anywhere, so you can rest assured about any video.
MKV and MP4 often have similar structures, meaning only the container format needs to be changed. This allows for rapid conversion.
There are no limits on the number of conversions or file size.
Converts the format while preserving the original quality.
If subtitles are included as a separate track in MKV, they may not be transferred as MP4 does not support them. Hardcoded subtitles (burned into the video) will remain.
The default audio track is automatically selected and included in the MP4. If there are multiple audio tracks (e.g., English, Spanish), the first track will be used.
Yes, most smart TVs natively support MP4. After conversion, you can play it directly from a USB drive.
Yes, the converted MP4 will play on all Apple devices, including iPhone, iPad, and Apple TV. While MKV cannot be opened with default apps, MP4 works without issues.
Most conversions finish in a few seconds. If a full re-encoding is required, it may take a few minutes depending on the file size.
Our AI automatically cuts out interesting parts and turns them into Shorts.