Free FLV to MKV Converter
Convert your files from FLV to MKV format with ease, online for free and unlimited. No sign-up required.
No restriction on the number & size of files (we don't store your files)
How to convert FLV to MKV
Only three simple steps to convert your file to another format
Built to cover your needs
NinjaConvert is the Swiss Army Knife of file conversion, supporting a wide range of formats and providing secure, efficient conversions.
100+ formats
Support all popular video, audio, image, and font formats.
Truly free
No hidden fees, no registration required. FREE FOREVER!
Privacy first
All conversion is done in your browser locally.
Batch conversion
Convert multiple files at once and save your time.
No limits
No restriction on the number and size of files. Unlimited conversions!
Easy as 123
With a few simple clicks, you can convert your files to any format.
Convert FLV to Other Formats
Looking for converting FLV to another format? Discover more conversion options below.
Convert MKV to Other Formats
Or interested in converting MKV to other formats? Explore supported conversion options below.
Frequently Asked Questions
Can't find what you're looking for? Contact us for help
An FLV (Flash Video) file is a multimedia container format used for streaming video and audio over the internet, and the files have an .flv extension. Developed by Adobe Systems for its Flash Player, FLV was the standard for web video until the discontinuation of Flash in 2020.
