How does the WMV to MP4 converter work?

Upload your WMV files and start the conversion. FFmpeg decodes the Windows Media video and audio, re-encodes the picture as H.264 and the sound as AAC, and saves an MP4.

Can I use the converter without signing up?

Yes. You can upload, convert and download without an account. Free use has a daily limit, and a $2.99 or $6.99 pass removes it, with no monthly subscription.

Are there file-size limits?

Each WMV file can be up to 20GB.

Does this work in a mobile browser?

Yes. dragdropdo runs in Safari, Chrome and other mobile browsers on iPhone, iPad and Android, so you can convert WMV files you've received and play them on your phone.

Can I batch convert WMV files?

Yes. Add several WMV files to one job, then download each MP4 file on its own or all of them together as a ZIP.

Is the video re-encoded?

Yes. WMV and VC-1 video can't play in MP4 on phones and browsers, so the picture is re-encoded to H.264 at high quality (x264 CRF 20) at the same resolution.

What happens to the sound?

Every audio track is kept, in the same order, as AAC with the same number of channels: mono at 96 kbps, stereo at 160 kbps and 5.1 at 384 kbps.

Can I convert a DRM-protected WMV?

No. Files with Windows Media DRM can't be decoded, so the conversion stops with a message saying the video is copy-protected.

Will the MP4 play on an iPhone and a Mac?

Yes. H.264 video with AAC sound in MP4 plays in Photos, QuickTime, Safari and every other Apple app.

Does it work with WMV9 and VC-1?

Yes. WMV7, WMV8, WMV9 and VC-1 (WMV9 Advanced Profile) are all decoded and re-encoded.

Why is my MP4 bigger than the WMV?

WMVs made for the web were often very heavily compressed. The MP4 is encoded at high quality, which can take more space, but the picture is never worse than the source.

How does the WMV to MP4 converter work?

Upload your WMV files and start the conversion. FFmpeg decodes the Windows Media video and audio, re-encodes the picture as H.264 and the sound as AAC, and saves an MP4.

Can I use the converter without signing up?

Yes. You can upload, convert and download without an account. Free use has a daily limit, and a $2.99 or $6.99 pass removes it, with no monthly subscription.

Are there file-size limits?

Each WMV file can be up to 20GB.

Does this work in a mobile browser?

Yes. dragdropdo runs in Safari, Chrome and other mobile browsers on iPhone, iPad and Android, so you can convert WMV files you've received and play them on your phone.

Can I batch convert WMV files?

Yes. Add several WMV files to one job, then download each MP4 file on its own or all of them together as a ZIP.

Is the video re-encoded?

Yes. WMV and VC-1 video can't play in MP4 on phones and browsers, so the picture is re-encoded to H.264 at high quality (x264 CRF 20) at the same resolution.

What happens to the sound?

Every audio track is kept, in the same order, as AAC with the same number of channels: mono at 96 kbps, stereo at 160 kbps and 5.1 at 384 kbps.

Can I convert a DRM-protected WMV?

No. Files with Windows Media DRM can't be decoded, so the conversion stops with a message saying the video is copy-protected.

Will the MP4 play on an iPhone and a Mac?

Yes. H.264 video with AAC sound in MP4 plays in Photos, QuickTime, Safari and every other Apple app.

Does it work with WMV9 and VC-1?

Yes. WMV7, WMV8, WMV9 and VC-1 (WMV9 Advanced Profile) are all decoded and re-encoded.

Why is my MP4 bigger than the WMV?

WMVs made for the web were often very heavily compressed. The MP4 is encoded at high quality, which can take more space, but the picture is never worse than the source.

Free WMV to MP4 Converter Online

Convert WMV to MP4 online so Windows Media videos play on iPhone, Mac, TVs and browsers. Upload files up to 20GB and download the converted result in a few clicks.

Convert MP4 to WMV

Drag & Drop your WMV file here

WMV files, up to 20GB

Files stay private.

Automatically deleted after 24 hours.

Link 20GB upload limit.

4.8/5

Trusted for 1,827,796+ conversions

HOW IT WORKS

Convert WMV to MP4 in three steps

Three steps, no account, nothing to install.

Upload your WMV files

Drag in .wmv files from Windows Movie Maker, an old camera, a screen recorder or a download folder.

Convert to MP4

Start the conversion. The WMV or VC-1 picture is re-encoded to H.264 at the same resolution, and WMA sound becomes AAC.

Download the MP4

Download each MP4, or several together as one ZIP.

WMV

WMV is Microsoft's Windows Media Video format, common for Windows Movie Maker projects and 2000s-era downloads.

MP4

MP4 is the most widely supported video format, playing in every browser, phone, TV and editing app.

FILE FORMATS

WMV and MP4 compared

SOURCE

WMV

Windows Media Video arrived in 1999 and was Microsoft's answer to RealVideo and QuickTime. WMV files use Microsoft's own codecs, up to WMV9 and VC-1, with WMA sound inside the ASF container. They play in Windows Media Player, while Macs, iPhones, Android and browsers need extra software.

TARGET

MP4

MPEG-4 Part 14 is the default container for phone recordings, web video and streaming. MP4 with H.264 video and AAC sound plays on iPhone and Android, in every browser, on smart TVs and in Windows and Mac players without extra codecs. It holds text subtitles and chapters, but not picture-based subtitles.

Feature	WMV	MP4
Developed by	Microsoft	MPEG (ISO)
File extension	.wmv	.mp4
Usual video codec	WMV7 to WMV9, VC-1	H.264, HEVC, AV1
Usual audio codec	WMA	AAC
Subtitles	Rarely	Text only
Best for	Windows Media Player	Sharing and playback anywhere
Plays on phones and browsers	Windows only	Yes

USE CASES

Use Cases for WMV to MP4

When a Windows Media file needs to play beyond Windows.

Play Movie Maker projects on a phone

Windows Movie Maker saved WMV by default. MP4 copies play on any phone or tablet.

Open old WMV videos on a Mac

macOS has no built-in WMV support. MP4 plays in QuickTime and Photos.

Upload to YouTube, Instagram or TikTok

Social platforms process MP4 faster and more reliably than WMV.

Edit in iMovie or Final Cut

Apple's editors don't import WMV. MP4 drops straight in.

Watch on a smart TV

TVs and streaming sticks play H.264 MP4 from USB or a media server.

Rescue a 2000s home video archive

Convert family videos burned to disc as WMV into a format that will keep playing.

Share training videos with clients

Corporate WMV training content becomes MP4 that plays in any browser.

Embed video on a website

HTML5 video needs MP4, not WMV.

Convert old screen recordings

Windows Media Encoder recordings become MP4 for documentation and support sites.

Send a clip in WhatsApp or Messages

Messaging apps accept MP4 and preview it inline.

SUPPORTED FILES

Which WMV Files Can I Convert?

WMV files from Windows tools, cameras and downloads are supported.

WMV7, WMV8 and WMV9

Every version of Windows Media Video, including WMV9 Advanced Profile (VC-1).

Windows Movie Maker exports

Projects saved from Movie Maker and Windows Live Movie Maker.

Screen recordings

Windows Media Screen recordings and Windows Media Encoder captures.

WMA, WMA Pro and multichannel sound

Every audio track becomes AAC with the same channel count.

A batch

Upload several WMVs and download the MP4s as a ZIP.

TROUBLESHOOTING

MP4 Not Playing Right?

Most issues come from protection or damage in the original WMV.

It says the video is copy-protected

WMV files with Windows Media DRM, common on old store purchases and rentals, can't be decoded.

Picture and sound drift apart

Some old WMV files have broken timing. Try exporting the original again from its source program.

The MP4 is larger than the WMV

H.264 at high quality can be larger than a heavily compressed WMV. The picture won't look worse than the original.

The picture looks soft

Many WMVs were made at low resolution for the web. The MP4 keeps that resolution and can't add detail.

A screen recording looks blurry

Screen codecs compress text differently from H.264. Very small text may soften slightly.

Still not working

A damaged WMV is converted as far as it can be decoded. Check that the original plays in Windows Media Player.

COMPARISON

dragdropdo vs. Desktop Video Converters

HandBrake, VLC and FFmpeg give you every setting once installed. dragdropdo is built for turning WMV into MP4 with sensible settings already chosen, from any device.

What matters	dragdropdo	Desktop Video Converters
Nothing to install	✓Yes. Runs in any modern browser.	~Yes, a download. FFmpeg also needs the command line.
Works on phones and tablets	✓Yes. Desktop, Android, iPhone and iPad.	~Mostly desktop only.
Batch conversion	✓Yes. Add many files and download one ZIP.	~HandBrake has a queue; FFmpeg needs scripts.
Share finished files	✓Yes. Send a unique link from the result page.	~You upload and share the files yourself.
Pricing	✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan.	~Free (HandBrake, VLC, FFmpeg).
Quality and size settings	✓Chosen for you for MP4, with nothing to tune.	~Yes. Full control over codecs, bitrate and resolution.

Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.

1.8M+

Files converted

and counting

4.8

Average rating

from our users

~4s

Avg. conversion

per file

Files kept

Auto-delete in 24h

WHY DRAGDROPDO

Built to be quick, safe, and free

Convert WMV to MP4 in your browser, with nothing to install and nothing kept after 24 hours.

Private by default

Files are encrypted in transit and deleted from our servers automatically after 24 hours.

No install required

Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.

Big files and batches

Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.

Share & download

Save finished files to your device or pass them on with a share link from the result page.

MORE WMV TOOLS

Explore our other video operations

WMV (Windows Media Video) is a popular video file format developed by Microsoft. Optimized for streaming, it delivers high-quality video while maintaining manageable file sizes. WMV files are perfect for playback on Windows-based devices and are often used for web video content due to their efficient compression. Enhance your video experience with versatile WMV format, compatible with various applications and media players.

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