Who still has FLV files?

Most FLV files come from old web downloads, screen recording software, or archived online lectures and tutorials from the Flash era (roughly 2002–2015). Some CCTV systems and webcams also saved video as FLV. If you have a digital archive from that period, you probably have FLVs.

Will the MP3 work on my phone or car stereo?

Yes. MP3 is the most widely supported audio format. All modern phones, tablets, computers, and car stereos can play MP3 files. You can copy the MP3 to your device or use it in any app that supports audio playback.

How much smaller will the MP3 be?

A typical 4-minute FLV (with video) is 40–80 MB. The MP3 extracted at 192 kbps will be about 3–6 MB. That’s over ten times smaller, since the video track is discarded and only the audio is saved.

Can I pick the MP3 bitrate?

Yes. You can choose 128, 192, 256, or 320 kbps. 192 kbps is the default and works well for most uses. Higher bitrates make larger files with slightly better audio, but most people will not notice the difference unless the source audio is very high quality.

Are there built-in alternatives to convert FLV to MP3?

Windows and macOS do not natively support FLV. VLC can open FLV and export to MP3 (Media > Convert/Save), but the process is more manual. Audacity can import some FLV files if you have the right FFmpeg plugin. There are few built-in options on mobile devices.

Does this tool upload my files?

No. All conversion happens in your browser. The FLV file is never uploaded or stored anywhere. Only your device’s memory is used. This is more private than most online converters.

What if my FLV has multiple audio tracks?

This tool extracts the first audio track only. Most FLV files have just one audio stream. If you need a different track, you’ll need to use a desktop tool like VLC or ffmpeg with command-line options.

Can I batch convert several FLVs at once?

Not in one go. Videozify processes one file at a time to avoid browser memory issues. Convert, download, then repeat for each FLV. For large batches, desktop tools like ffmpeg or VLC are faster, but require more setup.

FLV → MP3

FLV to MP3 Converter

Drop a file here

Click to browse, or paste a file from the clipboard.

Choose file

A FLV to MP3 converter extracts the audio track from an FLV (Flash Video) file and saves it as an MP3. With Videozify, your file never leaves your browser. You pick the MP3 bitrate (128–320 kbps). The tool encodes the first audio track with LAME, keeping the process local and private.

How to convert FLV to MP3

Drag your FLV file into the box above or click Browse to pick it from your computer.
Choose your desired MP3 bitrate (128, 192, 256, or 320 kbps). 192 kbps is a good balance for most uses.
Press Convert and wait for the progress bar to complete. The conversion runs in your browser.
Download the new MP3 file. It never uploads or leaves your device.

Why convert FLV to MP3?

FLV (Flash Video) files were common on the web from the early 2000s up to around 2015. You might have FLV files from old downloads, screen captures, or video archives. Many early webinars, online lectures, and tutorial sites used FLV as their default format. Today, most modern players and devices do not support FLV. Even VLC, which opens almost anything, sometimes struggles with odd FLV variants. On phones, FLV is rarely supported at all.

MP3 is a universal audio format. Every phone, tablet, car stereo, and media player can open MP3 files. If your FLV contains a lecture, podcast episode, or any content where you only need the sound, converting to MP3 makes playback and sharing much easier. MP3s are also much smaller than video files—ideal if you want to save space or listen on the go.

Converting FLV to MP3 is especially useful if you have old educational content, audio interviews, or radio shows saved in FLV. Many open-source and commercial editors struggle with FLV, but almost every audio app can handle MP3. Once your audio is in MP3, you can trim, join, or boost the volume with other tools, or even set it as a ringtone.

If you want to trim the audio after extraction, try the audio trimmer. If you need to join several MP3s, use the audio joiner.

FLV vs MP3: what's the difference?

Property	FLV	MP3
Extension	.flv	.mp3
Type	Flash Video container	Audio file (MPEG-1 Layer III)
Typical size (4 min)	40–80 MB (video+audio)	3–6 MB (audio only, 192 kbps)
Compression	Usually H.263/VP6 video, MP3/AAC audio	Lossy audio, adjustable bitrate
Quality	Depends on original audio track	Settable (128–320 kbps, defaults to 192)
Device support	Legacy (few modern players)	Universal (phones, PCs, cars, apps)

FLV is a container for Flash Video, often holding MP3 or AAC audio alongside video. MP3 is an audio-only format playable on nearly any device.

Does converting FLV to MP3 reduce quality?

When you convert FLV to MP3, the tool extracts the first audio track and encodes it to MP3 using the LAME encoder. You can pick the bitrate: 128, 192, 256, or 320 kbps. The default is 192 kbps, which is transparent for most voices and music. If the source audio in the FLV was already MP3 at a lower bitrate, converting again won't improve quality but won't make it much worse either. If the FLV audio is AAC or another format, you may lose a small amount of quality in the conversion. For spoken content, this is rarely noticeable.

File size drops dramatically. A 4-minute FLV with video can be 40–80 MB. The extracted MP3 will usually be 3–6 MB at 192 kbps. If you pick 320 kbps, the file will be larger (around 9 MB for 4 minutes), but most users do not hear a difference above 192 kbps unless the source is high-fidelity music.

If you want a lossless copy of the original audio, you should only convert if the FLV already contains MP3. Otherwise, converting to a lossless format like WAV or FLAC is better, but these files are much larger and not as widely supported for portable use.

When should you NOT convert FLV to MP3?

If your FLV has important video content you want to keep, converting to MP3 will throw it away. MP3 is audio-only. This conversion is best for lectures, podcasts, or music videos where you only need the sound.

If you need a lossless version of the audio for editing or archiving, MP3 is not the right choice. MP3 always compresses with some loss. For best preservation, consider extracting to WAV or FLAC first, then making an MP3 copy for convenience.

If your FLV is already in MP3 format and you just want to trim or join clips, converting again can slightly degrade quality. Use a direct audio editor like Audacity for lossless cutting if possible.

Frequently asked questions

Who still has FLV files?: Most FLV files come from old web downloads, screen recording software, or archived online lectures and tutorials from the Flash era (roughly 2002–2015). Some CCTV systems and webcams also saved video as FLV. If you have a digital archive from that period, you probably have FLVs.
Will the MP3 work on my phone or car stereo?: Yes. MP3 is the most widely supported audio format. All modern phones, tablets, computers, and car stereos can play MP3 files. You can copy the MP3 to your device or use it in any app that supports audio playback.
How much smaller will the MP3 be?: A typical 4-minute FLV (with video) is 40–80 MB. The MP3 extracted at 192 kbps will be about 3–6 MB. That’s over ten times smaller, since the video track is discarded and only the audio is saved.
Can I pick the MP3 bitrate?: Yes. You can choose 128, 192, 256, or 320 kbps. 192 kbps is the default and works well for most uses. Higher bitrates make larger files with slightly better audio, but most people will not notice the difference unless the source audio is very high quality.
Are there built-in alternatives to convert FLV to MP3?: Windows and macOS do not natively support FLV. VLC can open FLV and export to MP3 (Media > Convert/Save), but the process is more manual. Audacity can import some FLV files if you have the right FFmpeg plugin. There are few built-in options on mobile devices.
Does this tool upload my files?: No. All conversion happens in your browser. The FLV file is never uploaded or stored anywhere. Only your device’s memory is used. This is more private than most online converters.
What if my FLV has multiple audio tracks?: This tool extracts the first audio track only. Most FLV files have just one audio stream. If you need a different track, you’ll need to use a desktop tool like VLC or ffmpeg with command-line options.
Can I batch convert several FLVs at once?: Not in one go. Videozify processes one file at a time to avoid browser memory issues. Convert, download, then repeat for each FLV. For large batches, desktop tools like ffmpeg or VLC are faster, but require more setup.