Web Media Extensions 2.1.51.0

If an .ogg or .ogv file opens in the Windows Media Player app and nothing plays, Windows is missing the decoder that reads it.

Web Media Extensions is Microsoft's own free fix, a small add-on that teaches Windows to open OGG files with Vorbis audio or Theora video.

It works in apps built on Windows' own media engine, such as the new Media Player app, rather than in older players like Windows Media Player Legacy.

What Web Media Extensions Actually Does

The package adds three pieces to Windows. An OGG container parser reads the OGG wrapper file itself, a Vorbis decoder turns the audio inside back into sound, and a Theora decoder does the same for video.

They plug into Media Foundation, the media engine that the Media Player app and other modern Windows apps use. There is nothing to set up: once it is installed, those apps simply start playing OGG files.

Microsoft built the decoders on FFmpeg, the open-source media library behind countless players. Vorbis is still in everyday use - it is part of how Spotify uses Vorbis to stream music - and the free Ogg Vorbis tools are what many programs use to create it.

Which File Types It Covers

The file extension is a clue, but not a promise, because OGG is a container that can carry different kinds of audio and video.

If you are not sure what is inside a file, our free Codec Finder reads it in your browser and tells you, without uploading anything.

Which Apps It Helps, and Which It Does Not

Windows 11 ships two media players, and they do not use the same decoders. The modern Media Player app picks up Web Media Extensions straight away.

Windows Media Player Legacy, the classic blue player, was never extended by this package. For that player, and other older players built on DirectShow, LAV Filters or the K-Lite Codec Pack add OGG, Vorbis and Theora support instead.

Web browsers do not need it at all. Microsoft Edge, Chrome and Firefox carry their own decoders and play Ogg Vorbis audio themselves, but all three have switched off Theora video, and installing this package does not bring it back.

Check Whether You Already Have It

Web Media Extensions is a Microsoft Store app, so it shows up in your app list like any other. On Windows 11, open Settings, then Apps, then Installed apps, and search for Web Media Extensions.

On Windows 10 the same list is under Settings, then Apps, then Apps and features. To see which version you have, open Advanced options for it, where the version number is listed.

If it is there but OGG files still will not play, open the Microsoft Store, go to your Library and install any waiting updates.

Installing It

If you cannot use the Store, the download page offers the same package as an .AppxBundle file. Double-click it, and Windows' App Installer opens and installs it in one click.

There are two files, one for each version of Windows. Web Media Extensions 2.1.51.0 is for Windows 11, and Web Media Extensions 1.2.42.0 is for Windows 10 - both add the same OGG, Vorbis and Theora playback.

If Windows 10 shows "Cannot open app package" with the reason "Error in parsing the app package", you have the Windows 11 file. Download 1.2.42.0 instead and it installs normally.

Windows will not install an older version over a newer one. If the file is refused, check the version you already have first - you may not need to download anything.

Opus, WebM and Other Formats It Does Not Cover

Microsoft does not list Opus as part of this package, so a .opus file needs a player that decodes Opus itself. If you are choosing a format for your own recordings, our comparison of Opus or Vorbis explains which suits what.

WebM video needs a different extension, depending on the video inside it. Most WebM files from YouTube and the web use VP9, which the VP9 Video Extension adds, and newer ones use AV1, which needs the AV1 Video Extension.

Phone and camera video recorded in H.265 is a separate gap again, filled by the HEVC Video Extension.

Who Should Look Elsewhere

The tell is the player you actually use. If you open your files in VLC Media Player or MPC-BE, you do not need this package - both play OGG, Vorbis, Theora and Opus with their own built-in decoders.

For a music library full of OGG and Opus files, foobar2000 handles both without any add-ons.

And if the real problem is a car stereo or an old device that will not play OGG at all, convert the file instead. Our online audio converter turns OGG into MP3 in your browser, and the rest of the format fixes are in the Audio Codecs section.

Quick questions

Download Web Media Extensions 2.1.51.0 for Windows 11 or 1.2.42.0 for Windows 10 and see if your OGG files play, or tell us how you got on if you have used it before.