FLV to WMV converter
Convert FLV to WMV in seconds, free and unlimited. No upload, no sign-up, no watermark: your video never leaves your device.
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Quick answer: To convert FLV to WMV, add the FLV file to the iHateFiles FLV to WMV converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. Re-encodes the picture and sound into a WMV container.
Should you convert FLV to WMV?
Do this when something specifically needs WMV. The picture is re-encoded, so it costs a little quality; if all you need is a file that plays everywhere, MP4 is usually the better target.
The picture is re-encoded
An FLV usually holds Sorenson Spark, VP6 or H.264 from the Flash era. This writes Windows Media (MS-MPEG4) video with WMA sound into the WMV. Both sides are compressed with loss, so this is a second generation: leave the quality at its default or higher, because the encoder is working from FLV artefacts rather than the original.
Where the WMV will play
WMV plays on Windows, and VLC elsewhere; Macs need an extra player.
FLV and WMV side by side
| FLV | WMV | |
|---|---|---|
| Inside the file | Sorenson Spark, VP6 or H.264 from the Flash era | Windows Media (MS-MPEG4) video with WMA sound |
| Compression | Lossy | Lossy |
| Carries sound | Yes | Yes |
| Plays on | VLC and very little else since Flash was retired in 2020 | Windows, and VLC elsewhere; Macs need an extra player |
| Here | Read and write | Read and write |
What usually goes wrong
About the FLV. If you have FLV files they are probably old downloads worth rescuing, and converting them to MP4 is the way to keep them watchable.
About the WMV. A WMV that will not play anywhere may be DRM-protected rather than corrupt. No converter can remove that, and none should.
How to convert FLV to WMV
- Add your FLV file. It is read from your disk and stays there.
- Check the settings. The output format is already set to WMV.
- Press convert and the WMV file is saved back to your device.
Questions
How do I convert FLV to WMV?
Open this page, add your FLV file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this FLV to WMV converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to WMV lose quality?
WMV is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several FLV files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.