Convert videos to any format
Drag & drop video file here
Supports MP4, MKV, AVI, MOV, WebM and more
Drag & drop your MKV video
Automatic conversion with optimal settings
Save your converted FLV file
FLV conversion from MKV is only needed for legacy Flash-based platforms.
MKV is a flexible, open-standard container format that can hold an unlimited number of video, audio, subtitle, and metadata tracks. It's the preferred format for high-quality video archival and media collections.
FLV was the dominant web video format during the Flash era. While Flash is now deprecated, FLV files still exist in many archives and legacy systems.
MKV is a superior modern container. FLV is deprecated. Only convert for legacy system requirements.
Common scenarios for this conversion
Convert MKV to FLV when your device or app doesn't support the original format.
Upload FLV instead of MKV for better support on YouTube, Instagram, and TikTok.
Convert to FLV for seamless import into professional editing software.
Play MKV files on any phone by converting to FLV.
Your files never leave your device. All conversion happens in your browser — no server uploads.
Hardware-accelerated conversion powered by WebCodecs and WebAssembly.
Convert between any video format combination.