Free Online FLV to MKV Converter
Instantly convert your FLV videos to MKV format. 100% free, secure, and works on any device.
Upload FLV File
Select a single file
Max size: 200MB
How to convert FLV to MKV online
Follow these three simple steps to convert your files.
Upload FLV
Click the "Choose File" button to upload your FLV file.
Convert to MKV
Wait a moment while our servers securely process and convert it to MKV.
Download File
Once finished, click "Download" to save your new MKV file to your device.
Why convert FLV to MKV?
Whether you're preparing media for social platforms, archiving data, or optimizing for web delivery, converting FLV to MKV is highly recommended. Our secure converter guarantees a seamless transition from FLV to MKV while preserving the original integrity of your videos.
Enjoying ConvertMediaLab?
Help friends and colleagues discover 100% free, private media and PDF tools without watermarks or signups.
Trusted by Millions Worldwide
We process thousands of files every hour with zero compromises on quality or privacy.
10M+
Files Converted
2M+
Active Users
4.9/5
Average Rating
100%
Secure Conversions
"Honestly the fastest converter I've ever used. No ads, no BS, it just works perfectly every single time."
Sarah Jenkins
Content Creator
"I use this daily to convert massive 4K video files for my podcast. The fact that it's free and handles 200MB+ files is insane."
Marcus Chen
Video Editor
"I love that they don't store your files. As a lawyer, privacy is my #1 concern when converting confidential documents."
Elena Rodriguez
Legal Consultant