Convert FLV to MKV
Free, instant, and secure online converter. Upload your .flv file and receive a crisp .mkv result in seconds.
Need the opposite conversion? Convert MKV to FLV →
How to convert FLV to MKV
Upload Your File
Click the upload zone or drag and drop your .flv file anywhere on the area.
Start Converting
Hit Convert and our server will process your file instantly with high fidelity preservation.
Download Result
Your .mkv file is ready in seconds! Click download. Files auto-delete in 6 hours.
FLV vs MKV: Comparison
| Attribute | FLV (.FLV) | MKV (.MKV) |
|---|---|---|
| Category | video | video |
| MIME Type | video/x-flv | video/x-matroska |
| Description | FLV is a legacy Flash video format once dominant for online video streaming. | MKV (Matroska) is an open-source container that can hold virtually unlimited video, audio, and subtitle tracks... |
About These Formats
About FLV files
FLV is a legacy Flash video format once dominant for online video streaming.
About MKV files
MKV (Matroska) is an open-source container that can hold virtually unlimited video, audio, and subtitle tracks.
Frequently Asked Questions
How do I convert FLV to MKV?
Upload your .flv file using the box above, or drag and drop it in. We'll automatically convert it to .mkv format — just click download when it's ready.
Is it free to convert FLV to MKV?
Yes. Converting FLV to MKV is completely free, with no watermarks, no signup, and no limit on how many files you convert.
Is it safe to convert files here?
Yes. Files are processed securely and automatically deleted from our servers a few hours after conversion. We never share or view the contents of your files.
What is a flv file?
FLV is a legacy Flash video format once dominant for online video streaming.
What is a mkv file?
MKV (Matroska) is an open-source container that can hold virtually unlimited video, audio, and subtitle tracks.