MKV Converter
MKV is a flexible Matroska container suited to files that need more than a single video-and-audio track. It is useful for archives and high-control media workflows.
When this format makes sense
Use MKV when you need a flexible container for multiple streams or subtitles.
Try remuxing first when compatible streams already exist; this changes the container without re-encoding.
Re-encode only when the target codec, bitrate or compatibility requirements require it.
Advertised targets
MKVH.264H.265 / HEVCAV1VP9AACFLACOpus
Local conversion workflow
- Add your source file.
- Select the MKV output.
- Review codec and quality choices for the destination.
- Convert locally and verify the result.
Frequently asked questions
Does FastConvert upload my file?
No. The project describes a local FFmpeg workflow with no media upload stage.
Can I use hardware encoding?
Where the packaged application and the installed hardware expose a compatible encoder, the project advertises automatic NVIDIA, Intel and AMD hardware acceleration.
Use FastConvert locally. Download for Windows or browse the format guide.