Convert MP4 to MKV — Free
Upload your MP4 file and get a MKV in seconds. No account, no watermark.
How to convert MP4 to MKV
Convert your MP4 videos to MKV format quickly and easily with BoltConverter. Our free online tool handles the conversion process efficiently, allowing you to enjoy the benefits of the MKV container.
MKV files support multiple audio tracks, subtitles, and chapters, making them ideal for media enthusiasts. Simply upload your MP4, and we will convert it to MKV for you, ensuring your files are deleted after processing.
Upload Your MP4 File
Click "Choose File" or drag and drop your MP4 video into the designated area.
Start Conversion
Once your file is uploaded, click the "Convert" button to begin the MP4 to MKV process.
Wait for Processing
BoltConverter will process your file on our secure servers.
Download MKV File
After conversion, click "Download" to save your new MKV video to your device.
Frequently asked questions
Is BoltConverter free to use?
Yes, BoltConverter is a completely free online tool for converting MP4 to MKV files.
How long are my files stored on your servers?
Your files are processed server-side and are immediately deleted from our servers after conversion. We do not store your files.
Is there a file size limit for conversions?
Yes, the maximum file size for converting MP4 to MKV is 100 MB.
Will the output MKV file quality be good?
BoltConverter aims to maintain the original video and audio quality during the conversion from MP4 to MKV.
Can I convert multiple MP4 files at once?
Currently, BoltConverter supports converting one MP4 file to MKV at a time. Please convert files individually.