FLV to WMV Converter

Turn a legacy FLV into a Windows Media WMV file, free, in your browser, with no signup and no watermark.

Select FLV file →

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Choose Files

Click or drag and drop to upload files

We support most file types including: MP4, MOV, WEBM, AVI, MP3, WAV, PNG, JPEG, GIF, MKV, PDF, FLAC, TIFF!

EchoWave is used by creators, marketers, educators, and businesses to convert and edit media online.

Updated June 2026

FLV came from the Flash web and stopped playing in browsers when Flash was retired in 2020. WMV is Microsoft's Windows Media Video format, built for Windows Media Player and older Windows workflows. EchoWave converts FLV to WMV in your browser, free and with no signup, so an old Flash clip slots cleanly into a Windows-first pipeline or a PowerPoint slide.

Free, no sign-upNo account, no trial

Runs in your browserNothing to install

Works on every devicePhone, tablet, laptop

No watermarkClean output, every time

How it works

How to convert FLV to WMV

1
Upload your FLV
Drag your FLV onto the converter or pick it from your device. Nothing to install.
2
Choose WMV and convert
Select WMV as the output and start. Free, with no sign-up and no watermark.
3
Download your WMV
Save the finished WMV, or open it in the editor to trim, crop, or resize it first.

Try it

Estimate your WMV

Pick a video bitrate and a length to see the WMV file size before you convert.

Video bitrate

Length5 min

1 min30 min

Estimated WMV size183MBSharp 1080p

An estimate. Real size varies with resolution, frame rate, and how much the picture moves.

The formats

FLV vs WMV

FLV

Flash Video

Legacy Flash video from the pre-HTML5 web

Type: Flash video container
Holds: H.263, VP6, or H.264 video with MP3 or AAC audio
Typical size: Small, made for streaming
Plays on: VLC, since browsers dropped Flash in 2020

Best for:Recovering old Flash web video

WMV

Windows Media Video

Windows Media video, small and Windows-first

Type: Windows Media video
Holds: Windows Media video with WMA audio
Typical size: Small, built for Windows
Plays on: Windows Media Player and VLC

Best for:Older Windows video and slideshows

Will it lose quality?

When the codecs already match WMV, the converter can change the container without re-encoding, so the picture stays identical.
When the video has to be re-encoded for WMV, a high bitrate keeps it visually close to the FLV.
Converting cannot add detail the FLV never had. The output is at best as good as the source.

Use cases

What people use it for

Play anywhereMake a clip your device supports

Video editorsGet footage your software accepts

Web videoUse a format browsers play

CourseworkHand in a standard video file

SharingSend a clip people can open

Troubleshooting

If something looks off

The WMV will not play

Some players are picky about codecs. Try it in VLC, which opens almost anything, or convert again and let the converter re-encode the video.

The file got larger

A format change can shift the size, and re-encoding at a high bitrate adds overhead. Lower the bitrate or trim the clip for a smaller file.

Audio and video drift out of sync

Re-download the source and convert again. If a long recording drifts, splitting it into shorter pieces usually fixes the sync.

FAQ

FLV to WMV questions

Is the FLV to WMV converter free?

Yes. EchoWave converts FLV to WMV with no signup, no file-count limit, no trial, and no watermark. Upload your FLV, convert it, and download the WMV from your browser.

How do I convert FLV to WMV?

Upload your FLV, choose WMV as the output format, and start the conversion. When it finishes, download the WMV, or open the clip in the editor first to trim, crop, or resize it.

Why convert FLV to WMV?

WMV is the safe choice for older Windows tools: it drops straight into Windows Media Player and embeds reliably in PowerPoint. If you need a clip that plays everywhere instead, MP4 is the more universal target across phones, browsers, and TVs.

Will converting FLV to WMV reduce the quality?

WMV re-encodes the video with the Windows Media codec, and a high bitrate keeps the result close to the FLV. Converting cannot add detail the source never had, so the WMV is at best as sharp as the original.

Does WMV make a smaller file than FLV?

It can. WMV uses efficient Windows Media compression, so at a sensible bitrate you often get a clip of similar quality at a smaller size. The exact result depends on the codec that was inside the original FLV.

What plays a WMV file?

WMV is built for Windows Media Player and opens natively on Windows. VLC plays it on macOS, Linux, and Windows alike, which is the simplest option if you are not on a Windows PC.

Can I play the WMV on a Mac?

Macs do not play WMV out of the box, but VLC opens it without any extra setup. If the file will mostly be watched on a Mac or phone, converting to MP4 instead avoids the need for a separate player.

Does the FLV to WMV converter work on Mac and Windows?

Yes. The converter runs in any browser on macOS, Windows, Chromebook, and Linux, as well as iPhone and Android. There is nothing to download and no account to create.