Format conversion
FLV to MP3
FLV is the Flash Video container, the dominant web video format from 2005 to 2015. It still shows up in old screen recordings, legacy training videos and Flash-era downloads. VideoSplit converts FLV to MP3 without reviving the long-dead Flash Player.
FLV audio is usually MP3 or AAC. For an MP3-source FLV, the MP3 export is technically a one-generation transcode — the safer move is WAV export, but the 320 kbps MP3 output is effectively indistinguishable from the source.
Step-by-step
- Open VideoSplit.io. Drop the .flv file. F4V files work the same way.
- Pick MP3. Click the MP3 tag.
- Download. MP3 saves with the FLV's filename.
Quality and bitrate guidance
FLV audio bitrates were often low (64–96 kbps) in the Flash era because web bandwidth was expensive. A 320 kbps MP3 output does not add quality above the source; it just prevents any further loss during your next edit step.
Practical notes
- If the FLV has a truncated or corrupted header (common on files from 2005-2008), remux with ffmpeg first.
- Flash-era lecture recordings and training videos work fine — the audio is usually clean speech.
- F4V is Adobe's successor format; VideoSplit reads it on the same code path.
Free forever. No upload, no account.
Drop a video, get a WAV or MP3. Runs entirely in your browser — nothing uploads, nothing to install.
Try it free