Convert FLV to MP4 offline by JavaScript

Convert FLV to MP4 offline

Convert local FLV files to MP4 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 MP4 offline

Choose local FLV video files, choose "MP4" 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	MP4
Full name	Flash Video	MPEG-4 Part 14
File extension	.flv, .f4v, .f4p, .f4a, .f4b	.mp4, .m4a, .m4p, .m4b, .m4r, .m4v
MIME	video/x-flv	video/mp4
Developed by	Adobe Systems	International Organization for Standardization
Type of format	Media container	Media container
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.	MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet.MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet.