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Build a React.js Client Side Offline Video & Audio Converter & Encoder in Browser Using FFMPEG WASM
Mar 5, 2026
Buy the full source code of application here:
https://procodestore.com/index.php/product/build-a-react-js-client-side-offline-video-audio-converter-encoder-in-browser-using-ffmpeg-wasm/
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0:00
Uh hello guys, welcome to this video. So
0:02
in this video, I'll show you I built out
0:04
a ReactJS offline client side audio and
0:07
video converter and encoder application
0:10
directly using ffmpg web assembly. So we
0:14
are running this project react project
0:16
locally. This is actually the full
0:18
interface which looks something like
0:19
this. So it directly executes all the
0:22
processing on the browser. It's an
0:23
offline application. So this is actually
0:25
the full directory structure of the
0:27
project.
0:28
Each and every component is coded inside
0:30
Typescript. So it's fully customizable.
0:33
You can purchase the source code. The
0:35
link is given in the description. So
0:37
these are all the FFMPPG libraries.
0:40
So it's easy for you to actually add
0:43
more features on top of this project. So
0:45
we are using the latest version of React
0:47
and also using FFMPG web assembly
0:49
library.
0:51
So let me come to the application right
0:53
here. So the interface is quite simple.
0:56
So right here you will drag and drop
0:58
your video or audio file.
1:01
So just select the video section if you
1:03
want to convert your video.
1:07
[snorts] So as you select the video the
1:09
MP4 video will be selected right here.
1:12
You select the target format. So let me
1:15
convert this MP4 to MKV and press press
1:18
start. So now it will actually first of
1:21
all download the FMPG directly inside
1:24
your browser and then process your
1:26
videos frame by frame. So you can just
1:29
see the progress bar also. It's actually
1:32
showing this processing of FMPG.
1:35
So once it completes you will get the
1:37
notification and you will be able to
1:39
download your video
1:42
and same goes with audio as well. you
1:44
select the audio.
1:52
So here you can select all these
1:54
formats.
1:59
So the thing about this application it
2:01
directly runs in the browser. There is
2:02
no backend or server side to this. So
2:06
it's all happening directly in browser
2:08
using this library if you don't know. So
2:11
if you search on Google simply type
2:15
ffmpg web assembly library. So this
2:18
library allows you to use ffmppg
2:20
directly in the browser to build out
2:22
these video and audio converters. So it
2:27
can handle audio and video both.
2:36
So once it completes you will basically
2:39
get the notification
2:44
and same goes with audio as well. You
2:47
select your audio file.
3:09
So you will basically see the progress
3:11
is 31%. So when it reaches 100% you will
3:14
get the notification.
3:17
So you can do this unlimited number of
3:19
time because this is actually using
3:21
ffmppg.
3:24
So if you're interested in this project
3:26
guys, you can directly purchase it. uh
3:29
if you still face any problem I will
3:31
definitely help you. So you'll see we
3:33
selected the MP3 file. Select the target
3:36
format
3:38
and then it will initialize it.
3:41
So once it completes you will basically
3:45
allow it to actually download this. So
3:47
you can download.
3:50
So now your wave file is successfully
3:52
converted from MP3 to wave. So
3:55
automatically once it completes you will
3:57
see the notification that your
3:58
conversion is successfully converted
4:01
and the output file will get downloaded
4:04
automatically. So this is an all-in-one.
4:07
You can see it's completely responsive
4:09
on mobile devices as well. So it's an
4:11
all-in-one audio and video converter
4:14
application in ReactJS using ffmpg. So
4:17
if you're interested guys the link is
4:19
given in the description. So you will be
4:22
able to modify the source code and get
4:25
to know that how I coded this. So each
4:27
and every component as you see it's
4:30
directly coded inside Typescript. So
4:33
this is actually the main fmpg web
4:35
assembly library and uh you can just see
4:38
right here
4:40
and these are the set of commands here
4:43
to run the project locally. You simply
4:45
go to command line simply type the
4:47
command npm rundev. So this will start
4:49
the local development server. And if you
4:52
want to build the project, you simply
4:54
run the command npm run bit.
4:59
So it's an all-in-one
5:02
converter application.
5:05
For video, you select your video. For
5:08
audio, you select your audio file.
5:12
So it's really fast as well. So it
5:15
doesn't take too much time for actually
5:19
converting your videos. So it totally
5:21
depends upon the size of the video file
5:23
that you're selecting. So
5:26
if the video is large then it will take
5:28
some more time.
5:39
So now it has completed this. So
5:43
you will see that the video is
5:45
successfully converted from MP4 to
5:47
webin.
5:49
So you can see that so this is
5:54
the client side video and audio
5:56
converter in ReactJS
6:01
using FMPG web assembly library. So if
6:04
you're interested in this