FLV to WAV

Convert FLV to WAV in three steps

1. Choose one or more FLV files, or try the included sample.
2. Convert to WAV. Keep this tab open while it works.
3. Listen to the preview and save individual files or download the batch as a ZIP.

When FLV to WAV is the right move

FLV is the Flash Video container that web video used before HTML5, and you will meet it in archived web videos, old lectures, and screen recordings from the Flash era. WAV is the format editors, samplers, burners, and speech tools accept without fuss, so converting closes the gap between the file you have and the tool you need. Everything stays on your device while it runs, so private recordings never reach a server.

What happens to the audio inside

The converter opens the FLV file and reads the primary audio track, usually MP3 or AAC and sometimes a speech codec. It decodes that audio and writes uncompressed 16-bit PCM that you can edit repeatedly without extra generation loss. The picture is ignored, so the WAV contains sound only. Unpacking FLV audio to WAV does not add detail that the source never had. It gives you a plain, uncompressed copy that anything can read.

Size and settings

One minute of CD-quality stereo takes about 10 MB, and mono at 44.1 kHz takes about 5 MB. Choose WAV when the next step is editing, transcription, or loading the sound into hardware. Choose MP3 when you only want to share or store it. The sample rate and channel layout of your FLV file are carried across, so a mono recording stays mono.

Troubleshooting and tips

Some very old FLV files use speech codecs such as Nellymoser, which decode but sound narrow. That is how the recording was made, and no converter can add the missing detail. The first conversion of this format downloads an extra decoder of about 30 MB, and your browser keeps it for later. Only the decoder is downloaded. Your file is never uploaded. Convert a short file first to confirm that your browser can decode it, then run the rest as a batch and download the ZIP. Keep the original FLV until you have listened to the WAV from beginning to end.