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FLV to MKV Converter
Convert FLV files to MKV in seconds, free and unlimited.
🔒 Files are processed on your device. Nothing is uploaded.
How to convert FLV to MKV
- Click Choose files or drop your FLV files into the box. You can add several at once.
- Make sure MKV is selected as the output format.
- Press Convert, then download your MKV files.
FLV
Flash Video, once the format of online video players.
MKV
Matroska container that can hold almost any codec, many audio tracks and subtitles.
Video and audio are converted with FFmpeg running inside your browser. Short clips finish in seconds; long or high-resolution videos can take a few minutes because your own device does the work. Open Options to trim, resize or change quality.
Other FLV conversions
- FLV to MP4
- FLV to WEBM
- FLV to MOV
- FLV to AVI
- FLV to WMV
- FLV to MPEG
- FLV to 3GP
- FLV to OGV
- FLV to M4V
- FLV to TS
- FLV to GIF
- FLV to MP3
- FLV to WAV
- FLV to OGG
- FLV to OPUS
- FLV to FLAC
- FLV to AAC
- FLV to M4A
- FLV to M4R
- FLV to WMA
- FLV to AC3
- FLV to AIFF
Convert other files to MKV
- GIF to MKV
- MP4 to MKV
- WEBM to MKV
- MOV to MKV
- AVI to MKV
- WMV to MKV
- MPEG to MKV
- MPG to MKV
- M4V to MKV
- 3GP to MKV
- 3GPP to MKV
- 3G2 to MKV
- OGV to MKV
- TS to MKV
- MTS to MKV
- M2TS to MKV
- VOB to MKV
- MXF to MKV
- DV to MKV
- MOD to MKV
- RM to MKV
- RMVB to MKV
FAQ
Is converting FLV to MKV free?
Yes. Unlimited conversions, no sign-up, no watermark.
Are my files uploaded to a server?
No. FieldConvert processes files inside your browser, so your FLV files never leave your device. That makes it private and fast, because there is no upload or download wait.
Is there a file size limit?
Only your device's memory. Files up to about 2 GB work in most desktop browsers.