FLV (Flash Video) is a container format used to deliver video over the Internet. Convert FLV files to MKV format with our free online converter. MKV (Matroska Video) is an open standard multimedia container format.
Drag and drop your video file here, or click to browse
Supported formats: MP4, AVI, MOV, MKV, WMV, FLV, WEBM, 3GP, M4V
Maximum file size: 500MB
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100% free online conversion
No registration required
High-quality output
Fast processing
Secure and private
Multiple format support
Convert FLV videos for Multi-language content
Change video format for High-quality storage
Optimize video for Advanced users
Compatibility with different devices
Reduce file size while maintaining quality
Prepare videos for specific platforms
Choose the right quality settings for your needs
Higher quality means larger file sizes
Consider your target device's compatibility
Test the converted file before sharing
Keep original files as backup
Use appropriate resolution for your use case
Yes, our flv to mkv converter is completely free to use. No registration or subscription required.
We support MP4, AVI, MOV, MKV, WMV, FLV, WebM, 3GP, and M4V formats for both input and output.
Conversion time depends on file size and your device performance. Most files convert in 1-5 minutes.
Quality loss depends on your settings. We use high-quality codecs to minimize quality loss during conversion.
Currently, you can convert one file at a time. We're working on batch conversion features.
Yes, all processing happens in your browser. Your files never leave your device, ensuring complete privacy.
Please ensure you have the right to convert the video files you upload. This tool is for personal use only.