Add your FLV file
Drop one or more .flv files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
FLV to WAV
Pulling the soundtrack out of a .flv video into .wav audio keeps what you can hear and drops the picture entirely. Free, private, and validated — the file never leaves your browser.
100% private for supported formats
Runs on your deviceConvert supported files
Drop FLV files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Flash video to WAV audio
Pulling the soundtrack out of a .flv video into .wav audio keeps what you can hear and drops the picture entirely. An .flv file is a Flash Video container, the format that powered most web video during the 2000s. YouTube, news sites, and early streaming platforms delivered .flv streams into the Flash Player plugin before HTML5 video replaced the whole stack.
A .wav file is Microsoft's Waveform Audio format, which in practice almost always stores uncompressed PCM samples. Because every bit of the original signal is preserved and no decoding is required, .wav remains the default working format in recording studios and audio editors. For this route the practical draw is bit-perfect with zero generation loss and negligible CPU cost to read or write — balanced against enormous compared with FLAC, which halves the size losslessly, which is worth knowing before you commit a large batch.
Why convert FLV to WAV?
The usual reason to take .wav audio out of a .flv file is that only the sound matters — a talk, interview, song, or podcast segment. Keeping the video stream would waste storage, and a dedicated audio file is easier to trim, tag, and play. On the source side, no mainstream player ships FLV support anymore; on the target side, the payoff is bit-perfect with zero generation loss, which is exactly what you want for capturing and mixing sessions in a DAW.
FLV vs WAV at a glance
| Aspect | Flash video (.flv) | WAV audio (.wav) |
|---|---|---|
| Format type | Container — quality depends on the codecs and settings inside | Lossless — every pixel or sample is preserved exactly |
| How it stores data | a simple sequence of tagged audio, video, and script packets designed for progressive download and RTMP streaming | a RIFF chunk container whose fmt chunk usually declares linear PCM, though compressed codecs are technically permitted |
| Strongest at | recovering clips downloaded during the Flash era | capturing and mixing sessions in a DAW |
| Weak spot | no mainstream player ships FLV support anymore | enormous compared with FLAC, which halves the size losslessly |
| Metadata | an onMetaData script tag embeds duration, dimensions, and encoder details; there is no standard field set for titles or authorship | rIFF INFO chunks hold basic tags, while the Broadcast Wave bext chunk and iXML add description, originator, and timecode for production workflows; some tools also embed ID3 chunks |
Pick WAV as the output
Select .wav in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if WAV is selectable, the route is real and validated.
Convert on your device
Press Convert. A WebAssembly FFmpeg build demuxes the audio track and re-encodes it locally; the video stream is simply discarded.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid WAV file. Outputs keep the original filename with the .wav extension.
FLV to WAV questions, answered
Will converting FLV to WAV lose quality?
Since flv is container-oriented and wav is lossless-oriented, the conversion preserves the source content exactly as stored; no additional compression pass is applied beyond what .wav itself requires.
Is it private to convert FLV files here?
Yes — the .flv file is processed inside your browser tab and never uploaded. A WebAssembly FFmpeg build demuxes the audio track and re-encodes it locally; the video stream is simply discarded. Close the tab and the file is gone from memory.
Where will the WAV file work?
Windows, macOS, Linux, iOS, Android, and all major browsers play .wav natively. Recordings that exceed 4 GB require the RF64 variant, which some consumer software fails to recognize.
Will the WAV file be bigger or smaller than my FLV?
Much smaller — the video stream is usually 80–95% of a .flv file's weight, and it is discarded entirely. The remaining audio is re-encoded at the bitrate implied by your quality setting.
What happens to the metadata in my FLV file?
This converter strips container metadata deliberately (the FFmpeg command runs with metadata mapping disabled) so exported files do not leak recording details. In the source, an onMetaData script tag embeds duration, dimensions, and encoder details; there is no standard field set for titles or authorship; none of it is transmitted anywhere because the file never leaves your browser.