Convert FLV to MKV offline by JavaScript

Convert FLV to MKV offline

Convert local FLV files to MKV files offline by JavaScript in your web browser without any software downloads or file uploads!

Files:

Target:

Options:

Video size:

Video bitrate:

Frame Rate:

Aspect ratio:

Audio bitrate:

Mute:

Remove all audio streams

Show conversion logs

OUTPUT FILES:

#	File Name	File Size	Actions

How to convert FLV to MKV offline

Choose local FLV video files, choose "MKV" as target video format, then click the "CONVERT OFFLINE" button to start offline conversions in bulk. File size can be up to 2GB. Please note this offline audio converter only works in web browsers that support new technologies such as WebAssembly, Shared Array Buffer and Site Isolation. Use online converter instead if this offline converter doesn't work in your web browser.

Name	FLV	MKV
Full name	Flash Video	Matroska Video
File extension	.flv, .f4v, .f4p, .f4a, .f4b	.mkv, .mk3d, .mka, .mks
MIME	video/x-flv	video/x-matroska, audio/x-matroska
Developed by	Adobe Systems	www.matroska.org
Type of format	Media container	Container format
Introduction	Flash Video is a container file format used to deliver video over the Internet using Adobe Flash Player version 6 and newer. Flash Video content may also be embedded within SWF files. Flash Video used to be the de facto standard for web-based streaming video. Notable users of it include Hulu, VEVO, Yahoo! Video, metacafe, Reuters.com, and many other news providers.	The Matroska Multimedia Container is an open standard free container format, a file format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows.