- Home
- Video converter
- FLV to MKV
Convert FLV to MKV
Flash ended in 2020, so FLV videos no longer play on modern devices. MKV is a flexible container that plays happily in VLC and media servers.
- Free
- No sign-up
- Batch conversion
Why convert FLV to MKV?
To convert FLV files to MKV, drop them on the counter above.
Most files convert in seconds: no queue, no email address, and the MKV result saves straight to your computer or phone.
How to convert FLV to MKV
-
Add your FLV files
Drag your FLV files onto the counter or pick them with Choose files. You can add several at once.
-
Check the settings
The defaults suit most cases. Change quality, size or other options if you like; after a change, one click converts again.
-
Conversion starts by itself
Each file is converted to MKV and its row is stamped CONVERTED.
-
Download your MKV file
Get the file with Download. With several files you can download them all as one ZIP.
FLV vs MKV
| Property | FLV | MKV |
|---|---|---|
| Full name | Flash Video | Matroska Video |
| Type | Video | Video |
| Compression | Lossy | Depends on codec |
| Created by | Macromedia / Adobe | Matroska |
| Year | 2003 | 2002 |
| Extensions | .flv | .mkv |
| MIME | video/x-flv | video/x-matroska |
About the formats
FLV
Flash Video
FLV was the format of web video in the Flash Player era. Flash ended in 2020, so today these files usually need converting before they will play.
MKV
Matroska Video
MKV (Matroska) is a flexible video container that can hold several audio tracks, subtitles and chapters in one file. It is common in film collections and OBS recordings.
Frequently asked questions
Is converting FLV to MKV free?
Yes, completely free. No account, no daily limit, no watermark and no queue.
Does it work on a phone?
Yes. It works on iPhone, iPad and Android, with no app to install.
Is there a file size limit?
There is no size limit set by us. Files of hundreds of MB convert too; very large files take longer and are handled more comfortably on a computer than on a phone.
Other conversions
| Family | Give | → | Get | What you gain |
|---|---|---|---|---|
| FLV | MP4 | plays everywhere | ||
| FLV | MOV | Apple and video editors | ||
| FLV | WEBM | light video for the web | ||
| FLV | AVI | works with old players | ||
| FLV | GIF | silent loop | ||
| FLV | MP3 | sound only, plays on every device | ||
| FLV | WAV | sound only, lossless, ready to edit | ||
| MP4 | MKV | multiple audio and subtitles · phone video | ||
| MOV | MKV | multiple audio and subtitles · iPhone video | ||
| WEBM | MKV | multiple audio and subtitles · screen recording | ||
| AVI | MKV | multiple audio and subtitles · old camcorder footage | ||
| WMV | MKV | multiple audio and subtitles · Movie Maker video |