Fast, Free, Secure & Simple
Looking for the best way to convert MP4 to MKV online for free? You’ve come to the right place. At Change My File, we offer a simple, lightning-fast, and user-friendly MP4 to MKV converter. Whether you're editing videos, saving space, or improving video compatibility, our tool gets the job done — no downloads, no watermarks, and no hidden fees.
Change My File is recognized as one of the best MP4 to MKV converters on the web. Why? Because we offer:
Many users convert MP4 files to MKV to benefit from:
Converting your video is quick and easy with Change My File:
No sign-up required. No technical skills needed. 100% online.
Worried about video compression or losing resolution? Our online converter uses high-quality encoding to make sure your MP4 to MKV conversion keeps the best possible video and audio quality. Whether it's a short clip or a full-length movie, your content stays sharp and crystal clear.
Say goodbye to heavy desktop software. Our online video converter works completely in your browser. Just open the page, upload your file, and you're done. It's the most convenient and reliable way to convert MP4 files to MKV format quickly and safely.
Whether you’re at home, in the office, or on the go, our free MP4 to MKV converter is ready to use 24/7. No installation, no trial period — just fast, reliable conversions.
Is Change My File really free to use?
Yes! Our MP4 to MKV converter is 100% free with unlimited usage.
Is it safe to upload my videos?
Absolutely. We use secure SSL encryption and do not store your files after conversion.
Will the MKV file keep subtitles or multiple audio tracks?
Yes! The MKV format supports advanced features like embedded subtitles, multi-language audio, and chapter navigation.
Try the best MP4 to MKV online converter today — fast, free, and no signup required. Join thousands of users who trust Change My File for all their video format needs.