Convert MKV to MP4 Files Online for Free.
Free online tool to convert mkv to mp4 files quickly and securely. No installation required – start converting your files in just a few clicks!
Drag and drop your files here or click to upload.
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Maximum file size is 10MB
How It Works
How to Convert MKV to MP4
Click inside the file drop area to upload your MKV file or drag & drop it.
Select MP4 as the output format and click the 'Convert' button.
Download the converted MP4 file instantly after conversion.
You can also send a link to the converted file via email. (Optional)
Convert Your MKV files to other formats
RunConvert.com can convert your MKV files to these other formats:
Convert Your MKV files to other formats
Convert Files to MKV Format
RunConvert.com supports these converters to MKV format:
Convert Files to MKV Format
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Frequently Asked Questions
Here are some common questions and answers about mkv file conversions ask by our users on RunConvert.com.
Frequently Asked Questions
Q: Why won’t my video upload for conversion?
A: Check your internet speed, file size, or format. If it’s still acting up, our support team can jump in.
Q: How do I convert a corrupted video file?
A: We can’t fix broken files (yet), but if it’s playable, we can usually convert it.
Q: Can I use RunConvert for wedding videos?
A: Of course—whether it’s for sharing, archiving, or surprising your spouse with a highlight reel, we’ve got you.
Q: Why is my video blurry after conversion?
A: It might be set to a lower resolution or bitrate. Try converting again with higher settings.
Q: Can I convert videos from my phone?
A: Totally. Our platform works great on mobile, so whether you’re on iPhone or Android, you’re good to go.
Q: Does RunConvert change the frame size?
A: Not unless you tell it to. Your video keeps its original dimensions unless resized.
Q: What video formats can I convert on RunConvert?
A: Oh, pretty much all the usual suspects—MP4, AVI, MOV, MKV, WMV, FLV, and even some lesser-known ones. If it's a video file, we've probably got you covered.
Q: Will I lose audio when converting a video?
A: Nope. Unless you're converting to a silent format (which is rare), your audio stays intact.
Q: Can I extract just the audio from a video?
A: For sure. Choose MP3 as your output format and we’ll pull out the audio like magic.
Q: Will converting affect my video’s color quality?
A: Not unless you use a low-quality setting. Stick with recommended presets for rich, vibrant results.
What is MKV (Matroska Video)?
MKV (Matroska Video) is an open-source container format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is designed to be flexible and is often used for high-definition video content.
MKV is a popular choice for storing HD movies, TV shows, and videos due to its ability to support almost any type of video and audio codec, as well as multiple audio tracks and subtitles within one file.
How to open MKV?
MKV files can be opened with several media players, including VLC Media Player, PotPlayer, and Media Player Classic (MPC-HC).
For macOS users, VLC and IINA are great options to play MKV files. You can also use the official Elmedia Player for MKV playback.
MKV is Developed by: Matroska Association
MKV was Released on: 2003
Useful Links for MKV:
How to convert MKV?
You can easily convert MKV files to other formats like MP4, AVI, or MOV using our online video converter. Simply upload the MKV file, select your desired output format, and start the conversion process.
Our tool ensures quick and high-quality conversion, making MKV files compatible with a variety of devices and platforms.
What is MP4 (MPEG-4 Part 14)?
MP4 (MPEG-4 Part 14) is one of the most widely used video file formats. It is commonly used for storing video, audio, and subtitles in a compressed form while maintaining high quality. MP4 files are often used for streaming over the internet, on mobile devices, and for storing video content on platforms like YouTube.
MP4 is based on the MPEG-4 video compression standard and supports various codecs, including H.264 and AAC, which help deliver high-quality video and audio while keeping file sizes relatively small.
How to open MP4?
MP4 files can be opened with virtually all modern media players, including VLC Media Player, Windows Media Player, and QuickTime on macOS.
Mobile devices such as smartphones, tablets, and laptops natively support MP4 files, making it an ideal choice for video playback across platforms.
MP4 is Developed by: MPEG (Moving Picture Experts Group)
MP4 was Released on: 2001
Useful Links for MP4:
How to convert MP4?
Converting MP4 files is easy using online video converters. You can upload your MP4 file and choose from a variety of output formats such as MKV, AVI, or even audio formats like MP3.
Our online tool ensures fast and high-quality conversion, making your MP4 files compatible with many different devices, video players, and platforms.
What Our Users Say
Don't take our word for it – here's what users think about Runconvert.
Saved me hours of work
I had to convert multiple PDFs to Word for editing. This tool made it so easy and preserved all the formatting perfectly. The batch processing feature is a game changer.
Michael T
Professional quality
As a graphic designer, I need reliable conversion tools. This site delivers professional quality every time. The image conversions maintain resolution and color accuracy.
Elena R
Fast and reliable
I've tried many conversion tools but this one is by far the fastest and most reliable. No watermarks, no quality loss, and the interface is so intuitive.
David K
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