Convert MKV to FLV
MKV is great for movies with multiple audio tracks and subtitles, but FLV is the better choice for old web video archives. Convert MKV to FLV in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert MKV to FLV
- 1
Tap Choose files and select one or more MKV files (or drag them in).
- 2
Check that FLV is selected. Use Advanced options for resolution, size or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your FLV downloads automatically. Converting several files? Grab them all as a ZIP.
MKV vs FLV
Both formats are lossy, so the video is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| MKV | FLV | |
|---|---|---|
| Full name | Matroska Video | Flash Video |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Developed by | Matroska.org | Adobe |
| Introduced | 2002 | 2002 |
| Plays on iPhone | ✕ No | ✕ No |
| Plays on Android | ◐ Partly / with an app | ◐ Partly / with an app |
| Plays on Windows | ✓ Yes | ◐ Partly / with an app |
| Plays on Mac | ◐ Partly / with an app | ✕ No |
About MKV and FLV
MKV: MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks. It is popular for movies and anime but isn't supported by iPhone or most TVs out of the box.
FLV: FLV is the Flash Video format that powered early YouTube. Flash is gone, so FLV files usually need converting to play today.
Frequently asked questions
How do I convert MKV to FLV on my phone?
Will converting MKV to FLV reduce quality?
Is this MKV to FLV converter free?
Are my files uploaded to a server?
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