Free Video to MP4 Converter - Convert Any Video Online

A Medium (CRF 23) for sharing, High (CRF 18) for archiving, Low (CRF 28) for smaller files.

A No, original resolution is preserved. Only the container and codec are changed.

A Our free online tool allows you to easily convert MKV files, along with AVI, WebM, and MOV, directly within your web browser. Simply upload your MKV video, select MP4 as the output format, and the conversion happens on our servers. This means you don't need to install any software or plugins, making it convenient for quick conversions on any device.

A While our tool primarily changes the video's container and codec to MP4, preserving the original resolution, converting to MP4 can often result in a smaller file size compared to formats like AVI or WebM due to MP4's superior compression efficiency. This can be beneficial for meeting social media upload limits, allowing you to share your videos more easily without significant quality loss.

A We don't impose a strict file size limit for uploads; you can convert most standard video files. However, extremely large files, like those over 4GB, might take longer to process. For the best experience, we recommend uploading files under 2GB. You'll see the progress bar fill up as your video converts.

A DRM-protected files from services like Netflix or iTunes won't work. Our tool processes the video on our servers, and DRM encryption blocks that process entirely. You'll get an error message if you try. This isn't a limitation we can bypass legally. For your own recordings or downloaded files without DRM, everything works fine. Stick to unprotected content you own.

A No, wait until the file is fully downloaded or uploaded before starting conversion. Partial files cause errors or produce corrupted MP4s that won't play. For example, a 500MB MKV that's only 60% uploaded will fail. Let the progress bar hit 100% first, then hit convert. This saves you from wasting time on a broken output.

A Your files get encrypted during upload and deleted from our servers within 24 hours after conversion. That said, if you're working with confidential client videos or unreleased content, don't upload them to any online tool. A local converter is safer for that. For everyday stuff like vacation clips or training videos for your team, this is perfectly fine.

A It runs in any modern browser on iOS, Android, or desktop. I've tested it on Safari, Chrome, and Firefox mobile with files up to 1GB. The upload button works fine on a phone screen. Just tap the file picker, select your video, and let the server do the heavy lifting. No app download required. One tip: keep your phone screen on during conversion, or the upload might pause.

A We don't touch your original file at all. It stays on your device exactly as you uploaded it. The tool creates a fresh MP4 copy on our servers, then sends that copy to your downloads folder. Nothing gets replaced or deleted automatically. Want proof? Check your original file's timestamp after a conversion. It won't change. Just remember to clean up your downloads folder later.