Flash Video
The old Adobe Flash web video format, which modern browsers no longer play directly.
- Type
- video
- Best for
- old web video archives
No account · no upload · no watermark
Convert FLV to MKV. Completely free.
Drop your FLV and get an MKV back, right here in this tab. Your own computer does the work, so nothing gets uploaded, and there's no paid version.
FLV to MKV converter
Matroska Video
An open container that can hold almost any codec plus multiple audio and subtitle tracks.
- Type
- video
- Best for
- archiving films with several tracks
What to expect
If the video and audio inside are already something MKV can hold, they're copied across with no quality loss, which takes seconds. Otherwise they're re-encoded, on your graphics hardware where possible and with FFmpeg in the tab where not.
How to convert FLV to MKV
- Drop your FLV on this page, or choose it from your device.
- MKV is already selected. Adjust quality, size or trim if you want to, and each option shows the size it will produce.
- Press Convert, watch it work, then download the result.
Questions
Is this FLV to MKV converter really free?
Yes, completely. Every tool and every format is free, and there's no paid version, account, watermark or daily limit.
Do my files get uploaded?
No. Your browser does the work on your own device, so your files stay with you. Closing the tab clears them from memory.
Can I convert several files at once?
Yes. Drop as many as you like, and the results can be downloaded together as a ZIP.
Does it work on a phone?
Yes, in a current mobile browser. Large files are limited by how much memory your device can spare.
What should I know about FLV to MKV?
If the video and audio inside are already something MKV can hold, they're copied across with no quality loss, which takes seconds. Otherwise they're re-encoded, on your graphics hardware where possible and with FFmpeg in the tab where not.
People also search for
- Convert FLVs to MKVs
- FLV to MKV converter
- Change FLV to MKV
- Turn FLV into MKV
- Save FLV as MKV
- Convert .flv to .mkv
- Free FLV to MKV converter
- FLV to MKV without uploading
- FLV to MKV online, no sign-up
- Convert videos to MKV videos
- Convert video to MKV
- FLV to MKV free
More ways to get MKV
Related
Ready to convert your FLV?
- Completely free
- Nothing uploaded
- No account
- No watermark