WMV Converter

How to Convert WMV to Any Format

1. Upload Your WMV File: Drag and drop your .wmv video or click "Add Files". Batch is supported — drop in several WMV clips and each one converts in parallel, then download them together as a ZIP.
2. Pick an Output Format and Quality Preset: Choose the target container from the Video File Extension dropdown — MP4, MOV, MKV, WebM, AVI, GIF, and 25+ more — or pick MP3 to extract just the audio. Under File Compression, the default Quality Preset is "Very High (Recommended)". Switch to Specific file size to cap output at an exact MB target, Constant Bitrate for predictable streaming sizes, Variable Bitrate for smaller files at equal quality, or Constant Quality to fine-tune by perceptual quality.
3. Resize, Trim, or Change Codec (Optional): Under Video resolution, keep original, pick a Preset Resolution (2160p / 1440p / 1080p / 720p / 480p / 360p / 240p), scale by Resolution Percentage, or enter a custom Width × Height with aspect locked. Under Trim, enter a Start time and Duration. Advanced users can override the Video Codec (H.264, H.265, VP9, AV1, MPEG-4) and Audio Codec (AAC, MP3, Opus, FLAC, AC3).
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.

Popular WMV Conversions

• WMV to MP4 — the universal target; plays on Mac, iPhone, Android, and every browser
• WMV to MOV — for QuickTime and Final Cut Pro on macOS
• WMV to MKV — multi-track container for media-server libraries
• WMV to WebM — smaller, royalty-free files for HTML5 web embeds
• WMV to AVI — another Microsoft container for older Windows editors
• WMV to GIF — short silent loops for chat and docs
• WMV to MP3 — extract the audio track only

Why Convert a WMV File?

WMV (Windows Media Video) is Microsoft's video format, first released in 1999 with the WMV 7 codec. The video is compressed with one of Microsoft's WMV codecs — the most recent, WMV 9, was submitted to SMPTE in 2003 and approved in 2006 as SMPTE 421M, better known as VC-1 — and the result is wrapped in an ASF (Advanced Systems Format) container, which is why a WMV file's underlying structure differs from an MP4 or MOV even when both hold roughly comparable video.

That Windows-centric heritage is exactly why people convert away from WMV. The format was designed for the Windows Media Player era, and it never became a cross-platform standard the way MP4 did. Apple discontinued Windows Media Player for Mac years ago, so macOS, iPhone, and iPad do not play WMV natively — QuickTime throws an error, and the file usually needs converting before it will open at all. Browsers don't help either: no major browser (Chrome, Firefox, Safari, or Edge) decodes WMV in an HTML5 <video> element, so a WMV can't be embedded on a web page the way an MP4 or WebM can.

The most common reasons to convert a WMV file:

• Playback on Mac and mobile (MP4 / MOV) — Converting WMV to MP4 re-encodes the VC-1/WMV video to H.264 (the default) inside the universal MP4 container, which plays on Apple devices, Android, every browser, smart TVs, and consoles. For QuickTime or Final Cut Pro specifically, target MOV.
• Editing in modern software — Many non-Microsoft editors won't import WMV without a plug-in. Converting to an MP4 or MOV (H.264) gives them a file they accept out of the box.
• Web delivery (MP4 / WebM) — Since WMV can't be embedded, converting to MP4 (broad support) or WebM (smaller, royalty-free, for Chrome/Firefox/Edge) is the path to putting the clip online.
• Shrinking for sharing — WMV files from old screen recorders and slideshows are often larger than they need to be. Re-encoding to H.264 or H.265 MP4, downscaling, or trimming brings clips under messaging and email attachment caps. To shrink without changing format, use Compress WMV.
• Audio only (MP3) — To pull a soundtrack, narration, or interview out of a WMV, WMV to MP3 drops the video track and encodes the audio to MP3.

WMV Format at a Glance

WMV vs. Its Common Conversion Targets

WMV itself stores VC-1 or earlier WMV-codec video inside an ASF container, and plays natively only in Windows Media Player and players that bundle the codec (such as VLC). That narrow native-playback footprint is the gap every conversion above is closing.

Frequently Asked Questions

What is a WMV file and what plays it?

A WMV (Windows Media Video) file is Microsoft's video format, first released in 1999 with the WMV 7 codec. The video stream uses a Microsoft WMV codec — WMV 9 was standardized by SMPTE in 2006 as VC-1 — wrapped in an ASF (Advanced Systems Format) container. On Windows it plays in Windows Media Player. Cross-platform, the most reliable player is VLC, which bundles the WMV/VC-1 decoder. Apple's QuickTime, macOS, iPhone, and iPad do not play WMV natively, which is the single most common reason people convert it.

Why won't my WMV play on my Mac or iPhone?

Because WMV is a proprietary Microsoft format and Apple stopped shipping Windows Media Player for Mac long ago, so there's no built-in WMV decoder on macOS or iOS. QuickTime will refuse to open the file or play only the audio. The fix is to convert WMV to MP4 (re-encoded to H.264) or MOV — both play natively across Apple devices. You can also install VLC, but converting once is simpler if you need the clip to work in Photos, iMovie, or QuickTime.

Does converting WMV to MP4 reduce quality?

Converting WMV to MP4 re-encodes the video to H.264 (the default MP4 codec), which is lossy in principle — but at the "Very High" quality preset the difference is not visible in normal viewing. To keep quality as high as possible, leave the preset on Very High or pick Constant Quality, and don't downscale the resolution unless you specifically want a smaller file. The output won't look better than the WMV source — re-encoding can't add detail — but it shouldn't look noticeably worse.

What's the difference between a WMV and an ASF file?

They're the same container family with different labels. ASF (Advanced Systems Format) is Microsoft's container; a WMV file is an ASF container that holds a Windows Media Video stream (WMV 7/8/9, the last of which SMPTE standardized as VC-1) alongside a Windows Media Audio track, and it uses the .wmv extension by convention. The .asf extension is used for the same container when it carries other codec combinations. Because both are Windows-centric, neither plays natively on macOS, iOS, or in a browser's HTML5 player — so whichever extension you have, converting to MP4 (H.264) is the reliable way to make it play everywhere.

What's the best format to convert WMV to for general use?

MP4 with H.264 video and AAC audio — it's the default here for a reason. H.264 MP4 plays on Windows, macOS, iOS, Android, every modern browser, smart TVs, and game consoles, so a single MP4 covers virtually every device someone might open it on. Choose MOV instead only if you're specifically editing in Final Cut Pro or another QuickTime-based tool, or WebM if you need the smallest file for embedding on a web page in Chrome, Firefox, or Edge.

Will the audio survive when I convert WMV to MP4?

Yes. WMV files typically pair the video with WMA (Windows Media Audio); when you convert to MP4 the audio is re-encoded to AAC by default so it plays everywhere, and the streams stay in sync. In our testing, a one-minute 1080p WMV screen recording converted to a standard H.264 + AAC MP4 with audio intact and no drift. If you only want the sound, pick MP3 as the output format — or use the dedicated WMV to MP3 flow — and the video track is dropped entirely.

Is there a file size limit for converting a WMV?

There's no fixed per-file cap. Conversion runs on our servers, so the practical limit is your upload size and connection speed, not your device — large screen-recording and slideshow WMVs convert routinely. You can also batch many files at once and download them as a single ZIP. Uploaded files travel over an encrypted connection and are deleted automatically after a few hours; nothing is shared, watermarked, or made public. To shrink a WMV without changing its format, use Compress WMV.

Can I convert a file back into WMV?

Yes — WMV is available as an output format, though it's rarely the best choice today. When you convert a file to WMV here, the defaults are the Windows Media Video codec (WMV2) for the picture and Windows Media Audio (WMAV2) for the sound, wrapped in the ASF container — the combination Windows Media Player expects. Choose WMV only when a legacy Windows application, kiosk, or embedded player specifically requires it; for anything modern, an MP4 with H.264 plays in far more places. Converting into WMV is a fresh encode, so it won't recover quality lost in an earlier conversion.