Turn MKV videos into FLV. It is converted in your browser, so the file never leaves your device.
Drop MKV files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop MKV (Matroska) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab and can take a while for large files.
Save the FLV, or download everything as one ZIP if you converted several files.
The MKV to FLV converter is part of this page and runs inside your browser. Your videos are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so work starts the moment you press Convert. How long it takes depends on your device and the size of the file.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
MKV does not play on iPhones, in QuickTime or in most browsers and editors. FLV is still used by some live-streaming and recording tools. MKV is at home in films with several audio and subtitle tracks; FLV is the usual choice for nothing new; it survives in old downloads and stream recordings.
The defaults suit most files. Under Options you can lower the resolution, trade quality against file size, remove the sound and trim the start and end. This is demanding work for a browser: a long or high-resolution file can take several minutes, and your device does all of it, so keep the tab open.
This pair uses the compatibility engine, ffmpeg built for the browser, because FLV cannot be written by the browser's built-in codecs. It is a one-off download of about 10 MB that the browser keeps, it is slower than the built-in codecs, and it takes files up to 1 GB.
MKV is an open container that can hold practically any video and audio format plus multiple subtitle tracks. That flexibility is why it is popular for films, and why Apple devices and browsers refuse it.
Opens in VLC, Plex and many TVs; not iPhones, QuickTime or most browsers
MKV converterFLV was the format behind web video in the Flash era. Flash Player was retired at the end of 2020, so FLV files no longer play in any browser.
Opens in VLC and little else since Flash Player was retired in 2020
FLV converter| MKVMatroska video | FLVFlash video | |
|---|---|---|
| Stands for | Matroska | Flash Video |
| Type | Video container | Video container |
| Compression | Depends on what is inside | Lossy |
| Usually contains | Almost anything: H.264, HEVC, AV1, several audio and subtitle tracks | Sorenson Spark, VP6 or H.264 video with MP3 or AAC audio |
| Introduced | 2002, by the Matroska project | 2002, by Macromedia (later Adobe) |
| Opens in | VLC, Plex and many TVs; not iPhones, QuickTime or most browsers | VLC and little else since Flash Player was retired in 2020 |
| Best for | Films with several audio and subtitle tracks | Nothing new; it survives in old downloads and stream recordings |
| File extension | .mkv | .flv |
No. The MKV to FLV conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
It depends on what is inside the MKV. When its video and audio are already in a form FLV can hold, they can be carried over without being compressed again. Otherwise they are re-encoded, which costs a little quality. Under Options you can favour quality or a smaller file.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the MKV file, press Convert and save the FLV. There is nothing to install.
Yes. MKV to FLV runs on the compatibility engine, which takes files up to 1 GB, and a long clip takes a while because it is slower than the browser's built-in codecs. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.