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Free Online F4V to MKV Converter

Convert F4V video to MKV online for free.

Drop F4V files here
or click anywhere in this box to choose files

Up to 50 MB per file. Sign up free to convert files up to 100 MB.

When MKV is the right output

MKV is an open container that holds essentially any codec, popular with archive-quality releases, multi-language / multi-subtitle content, and the ripping community. Convert to MKV when preserving multiple audio tracks or subtitle streams matters. Playback support is universal on desktop, variable on mobile / TV apps.

Frequently asked questions

How do I convert F4V to MKV?

Upload the F4V file and choose an output format. It is repackaged into the MKV container, keeping the original resolution and frame rate. No account is required.

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Video conversion guides

MKV vs MP4: Which Video Format Should You Use? MKV and MP4 are the two most popular video containers, but they serve very different purposes. Here is when to use each and how to convert between them. MOV vs MP4: Which Video Format Is Better? MOV and MP4 are the two most common video formats, but they are not interchangeable. Here's when to use each one and why MP4 wins for almost everything except Apple-specific editing. Why Won't My Video Play? How to Fix Unsupported Format Errors Fix 'unsupported format' and 'codec not found' video errors. Learn why videos won't play and how to convert MKV, AVI, MOV to universally compatible MP4. RMVB and RM Files Won't Play? How to Convert Old RealMedia Videos Found old .rmvb or .rm files that nothing will play? RealMedia is basically a dead format. Here's how to convert those files to something modern.
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