How to use the MKV to MP4
- Choose your video – Pick a file from your phone or computer (MP4, MOV, AVI, MKV, WEBM).
- Pick the options – The defaults work for most videos.
- Download – Your file is ready in seconds to a few minutes, depending on length.
About MKV to MP4
MKV files often won't open on phones, smart TVs or in video editors. Convert them to MP4 so they play everywhere.
Frequently asked questions
How long and how big can my file be?
Up to 100 MB and 5 minutes per file, with output up to 720p. A fair-use limit of 30 video/audio files a day keeps the free servers fast for everyone.
Are my videos private?
Yes. Files travel over HTTPS, are processed automatically on our servers, are never shared and are permanently deleted after 1 hour.
Is MKV to MP4 free?
Yes – free with no account and no watermark. Files can be up to 100 MB and 5 minutes (720p). A fair-use limit of 30 files a day keeps the servers fast for everyone.
Do I need to install software or sign up?
No. It works in any browser on Windows, Mac, iPhone and Android. No account needed.
Is there a watermark?
Never. Your videos and audio files are clean, with no watermark or branding.