FLV to WMA Converter

Extract WMA Audio from FLV — But Read This First

This tool pulls the soundtrack out of a legacy FLV (Flash Video) file and re-encodes it as Windows Media Audio (.wma). Be honest about what that means before you start: the picture is discarded, and you are moving audio from a dead Adobe container into a declining Microsoft codec. The audio inside an FLV is almost always already lossy (usually MP3, sometimes AAC or Nellymoser), and WMA is also lossy — so this is a generational re-encode that can only lose a little quality, never recover any. Do it only when a specific old Windows device or program demands a .wma file. If you just want a clip that plays everywhere, extract MP3 instead — MP3 plays on everything WMA does and far more.

How to Convert FLV to WMA

1. Upload Your FLV File: Drag and drop your .flv onto the page, or click "Add Files" to pick it from your computer. You can queue several FLV files at once and they'll share the same export settings.
2. Set the Quality Preset or Bitrate: Open Advanced Options and leave Quality Preset on the default ("Highest") for an even export, or switch to Constant Bitrate for a predictable file size. The source FLV's own audio bitrate is the real ceiling — encoding above it just makes a bigger file, not a better one.
3. Pick the WMA Codec, Channel, or Trim (Optional): Under Audio Codec the output defaults to WMA v2 (the most compatible variant); switch to WMA v1 only for very old players that require it. Leave Audio Channel and Audio Sample Rate on "Original" to preserve the source, or use Trim to export just one segment.
4. Convert and Download: Click "Convert" and download your WMA file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.

FLV Audio vs WMA Output

Frequently Asked Questions

Should I really convert FLV to WMA, or is there a better target?

For most people, WMA is the wrong target. You are taking audio out of a dead Flash container (Adobe ended Flash Player support on December 31, 2020) and putting it into a Microsoft codec from 1999 that has been declining for years and barely plays outside Windows. The only good reason to pick WMA is a specific old Windows device, a Windows Media Player-era library, or a program that only accepts .wma. For anything you want to play on a phone, a browser, or a car stereo, extract MP3 from the FLV instead — it is the safe universal choice.

Will converting FLV audio to WMA lose quality?

Yes, to some degree. The audio inside almost every FLV is already lossy — MP3, AAC, Nellymoser, ADPCM, or Speex — so detail was permanently discarded at the original encode. Decoding that and re-compressing it as WMA is a second lossy pass, and the second pass cannot rebuild what the first one removed. Choosing a WMA bitrate at or above the source bitrate keeps the added loss small, but it is never truly transparent. If you want to avoid a second lossy generation entirely, export to FLV to WAV instead, which stores the decoded audio uncompressed.

Does the converter keep the video from my FLV file?

No. This is audio extraction — the picture is discarded and you get an audio-only .wma. That is the point if you only want the soundtrack from an old screen recording, lecture, or ripped stream. If you actually want a playable modern video file, convert the whole thing with FLV to MP4, which keeps both the video and the audio in a format every current device handles.

Which WMA version does the output use, and why?

By default the converter encodes WMA v2, the standard lossy Windows Media Audio variant that the broadest range of Windows software and devices can read. You can switch to WMA v1 under Audio Codec for very old players that specifically require it. Microsoft also ships WMA Pro, Lossless, and Voice variants, but standard WMA v2 is the most compatible general-purpose target — and re-encoding an already-lossy FLV track into WMA Lossless would only inflate the file without recovering any lost detail.

My FLV is a Nellymoser screen recording — will the audio convert?

Yes. Flash recorded microphone and webcam audio with the Nellymoser Asao codec, which was tuned for low-overhead real-time speech rather than music fidelity. It decodes and re-encodes to WMA normally, but the result will preserve the source's narrow bandwidth — Nellymoser-sourced audio can sound thin because that is how it was originally captured, and a higher WMA bitrate will not add back detail the recording never had.

Is the FLV to WMA converter free, and what happens to my file?

Yes — there is no sign-up, no watermark, and no file-count limit. Your file is uploaded over an encrypted connection, converted on our servers, and deleted automatically a few hours after conversion; it is never shared or made public. In our testing, a 3-minute FLV with a 128 kbps MP3 audio track re-encoded to 128 kbps WMA v2 produced a file of roughly 2.8 MB, since the output size tracks the WMA bitrate you choose rather than the FLV source. The main practical limit on a large file is upload size and your connection speed, not your device.