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Convert FLV to MP3 – Extract Audio from Flash Videos

Free online converter — No software installation required. Fast, secure & unlimited.

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format

Step 3: Convert files

Read Terms of use before using

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format

Step 3: Convert files

Read Terms of use before using

500+ Formats

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Have Old FLV Files You Can't Play?

FLV (Flash Video) was everywhere in the 2000s and early 2010s. YouTube, Vimeo, and countless websites used it. If you downloaded videos back then, you probably have FLV files sitting in old folders.

The problem: Flash is dead. Adobe officially killed it in 2020, and most modern devices won't play FLV files without special software.

The solution: Extract the audio. If those old videos contain music, interviews, lectures, or any audio worth keeping, convert them to MP3 and preserve what matters.

Why Extract Audio from FLV?

Converting FLV to MP3 makes sense when:

The video won't play anymore – Browsers dropped Flash support; your FLV files are effectively trapped
You only need the audio – Music videos, podcasts, lectures, interviews where visuals don't matter
Storage cleanup – FLV video files are large; MP3 audio is 90% smaller
Preserving old content – Some FLV files contain audio that's no longer available online
Creating playlists – Turn your old video downloads into a music library

How to Convert FLV to MP3

Upload your FLV file – Drag and drop or browse to select your Flash video
Confirm MP3 output – MP3 is pre-selected for universal audio compatibility
Download your audio – Get just the audio track, ready to play anywhere

The video portion is discarded. You receive only the audio in MP3 format—playable on every device, app, and platform.

What Happened to FLV?

FLV dominated online video for over a decade:

2002-2010 – YouTube, Hulu, and most video sites used FLV exclusively
2010-2015 – HTML5 video began replacing Flash
2017 – Adobe announced Flash end-of-life
2020 – Flash officially discontinued; browsers removed support

If you downloaded videos during the Flash era, those FLV files are now digital artifacts. The audio inside them, however, is perfectly fine—it just needs extraction.

Common FLV Sources

Old YouTube Downloads

Before YouTube offered official downloads, tools like KeepVid, SaveFrom, and browser extensions saved videos as FLV. If you built a music collection this way, those files still contain the original audio.

Screen Recordings

Many screen recording tools from the 2000s exported to FLV. Webinars, tutorials, and presentations from that era may have audio worth preserving.

Archived Web Content

News clips, interviews, rare performances, and other content that may no longer exist online. The video quality might be outdated, but the audio remains valuable.

Gaming Videos

Game trailers, walkthroughs, and soundtrack recordings from the Flash gaming era. Extract the music or commentary you want to keep.

Audio Quality Expectations

FLV files typically contain audio encoded at:

MP3 at 128kbps – Standard quality for most web videos
AAC at 128-256kbps – Higher quality, common in later FLV files
Nellymoser/Speex – Lower quality, used in some screen recordings

We extract the original audio stream and convert to high-quality MP3. The output quality matches what was in your original FLV—we preserve everything that's there.

File Size Reduction

Extracting audio dramatically reduces file size:

50MB FLV video → ~5MB MP3 audio (90% smaller)
200MB FLV video → ~15MB MP3 audio
1GB FLV collection → ~100MB MP3 library

If storage is a concern, converting to MP3 lets you keep the audio while freeing up significant disk space.

Batch Convert Your FLV Collection

Have dozens or hundreds of old FLV files? Upload them all at once and batch convert to MP3. Perfect for:

Processing an entire folder of old downloads
Creating an audio library from video archives
Migrating content from old hard drives
Preserving audio before deleting large video files

Free, unlimited, no signup required.

Why Not Just Convert FLV to MP4?

You could convert FLV to MP4 to keep the video playable. Choose that route if:

The video content itself is valuable
You want to watch, not just listen
Visual quality matters for your use case

Choose FLV to MP3 if:

You only care about the audio (music, speech, podcasts)
The video quality is too low to be worth keeping
You want maximum storage savings
You're building an audio playlist from video sources

Works Without Flash

Our converter doesn't need Flash Player—it processes the FLV container format directly. Upload from any modern browser on any device:

Windows, Mac, Linux
Chrome, Firefox, Safari, Edge
iPhone, iPad, Android

No plugins, no software installation, no Flash required.

How to convert FLV to MP3

Convert FLV into MP3 for universal use.

1

Upload your FLV file

Click Upload and select your FLV file from your device.

2

Confirm MP3 as output

The MP3 format is auto-selected for this page—confirm it (or choose if needed). Great for podcasts and songs.

3

Convert and download

Click Convert Now and download your MP3 file. Sort into playlists. Note: Video is removed.

Tip: Save an FLV seminar as MP3 for playback anywhere.

FLV vs MP3

MP3 Format

file extension

.mp3

file category

Audio

stands for

MPEG Audio Layer-3

developer

Fraunhofer- Gesellschaft (A German research institute)

links

en.m.wikipedia.org

overview

It is a digital Audio which compresses the tracks using the lossy format. Although, it follows the lossy format, yet, there will be no noticeable change in the quality of audio. It only discards the superfluous information that a human ear is inefficient to process or hear. With the help of the this extension, one can upload and download audio files with ease, irrespective of the internet connection speed even a dial-up connection users can access these files. There are a number of MP3 Blogs(music blogs) available on the internet where maker uploads music files and a user can download the same without any trouble. These blogs help people to get an insight into the music world. Hype Machine is an example of an audio blog.

technical description

MP3 uses lossy data compression, which means when data is encoded it is not the full original version, it’s a substitute to original copy but in a smaller size. This compression can lead to a decrease in file size, ranging from 75% to 95%. This format is based on perceptual coding due to which this extension screens out the noise, and results in an audio file that uses a low bit rate(lowest bit rate in it is 128kbps). It provides audio of fair sound quality. As it is only an audio file, thereby, if there are any images linked to it then they need to be stored in a separate file.

FLV Format

file extension

.flv

file category

Video

stands for

Flash Video

developer

Adobe Systems (initially developed by Macromedia)

links

en.m.wikipedia.org

overview

It is a multimedia container file format which is used over the internet to provide digital video content to the users. Digital video content includes TV shows or series, movies; etc. Adobe Flash Player 6 and new versions provide support to it. To play flash video from Personal Computer and online websites we need an FLV player. Although, Apple iOS does not support Flash, yet, with the help of additional software, one can play flash videos. Also, it is a common platform for various websites that allows video streaming such as YouTube, Yahoo! Video, Metacafe, Hulu; etc . With the help of screen capturing and other recording programs, screen recording is possible for flash videos. Furthermore, it also supports a screen share or screen cast.

technical description

FLV files mostly have video bitstreams which are one of the variants of H.263 Standard and it is named as Sorenson park(FourCC FLV1). The SWF files and this extension uses the identical way to encode data. There are two variants available for screen casting. First one is lossy as it reduces colour depth or bit depth (number of bits used to indicate the colour of one pixel) and compresses the data. The second type is only compatible with Flash Player 8 and the newer versions. Both these aforesaid kinds are based on bitmap tile. Uncompressed Audio or ADPCM format audio is also supported by it. This format has header and packets in its video structure. A standard header includes signature, version, flags and header size.

Frequently
asked questions

Yes. FLV is just a container format—it doesn't require Flash Player to extract the audio. Our converter processes FLV files directly in your browser without any Flash software.

The output quality matches your original FLV's audio track. Most web videos used 128kbps MP3 or AAC audio. We extract and convert this to high-quality MP3, preserving everything in the original.

Adobe discontinued Flash in 2020, and all major browsers removed Flash support. FLV files require special software to play now. Extracting audio to MP3 gives you a universally playable format.

Typically 90% smaller. A 50MB FLV video becomes roughly 5MB as MP3 audio. You're removing the video track entirely, which accounts for most of the file size.

Yes. Upload your entire collection of FLV files and batch convert them all to MP3 simultaneously. Free and unlimited.

Yes. FLV was YouTube's original format. Videos downloaded before 2010-2015 are likely FLV files, and they convert perfectly to MP3.

Convert to MP4 if you want to keep the video playable. Convert to MP3 if you only need the audio (music, podcasts, lectures). MP3 is much smaller and plays everywhere.

No. Our converter works entirely in your browser without Flash. It reads the FLV container format directly and extracts the audio stream.

The output matches your input. If the original FLV had low-quality audio (common in older web videos), the MP3 will reflect that. We preserve what's there but can't enhance beyond the original quality.

Yes. The converter works in mobile browsers on iPhone and Android. Upload your FLV file and download the MP3 directly to your device.