Free online XWM to OGG converter

What the XWM format is

XWM is an audio format used in Bethesda game assets, including titles such as The Elder Scrolls V: Skyrim and Fallout 4. It is based on Microsoft's xWMA compression and is commonly produced by Bethesda's audio build pipeline or encountered after extracting sound files from game archives. Standard music players and audio editors often cannot decode XWM directly.

An XWM file may contain music, dialogue, sound effects, or ambience. Files found inside game archives must be extracted before conversion; archive extraction and audio conversion are separate operations.

What the OGG format is

OGG usually refers to an Ogg container carrying Vorbis audio. Vorbis is a lossy codec that provides smaller files than uncompressed WAV while retaining broad support in games, media players, web applications, and audio tools.

Use OGG when the destination program supports Vorbis, when file size matters, or when you need an open alternative to proprietary audio formats. OGG is not ideal as an editing master because converting already-compressed XWM audio to Vorbis introduces another lossy encoding step.

How to convert XWM to OGG

Convert with 101convert.com

You can convert the file for free on 101convert.com without installing software:

1. Open the site's XWM converter.
2. Select the .xwm file. If it is still inside a game archive, extract it first.
3. Choose OGG as the output format and start the conversion.
4. Download the resulting .ogg file and test it in the target player or editor.

Use MultiXwm and FFmpeg on a desktop

For local conversion, use a Bethesda-audio utility such as MultiXwm to decode XWM to WAV, then use FFmpeg to encode the WAV as OGG:

1. Open MultiXwm, add the input.xwm file, select WAV as the output, and run the decode operation.
2. Convert the decoded file with FFmpeg:

ffmpeg -i input.wav -c:a libvorbis -q:a 5 output.ogg

The -q:a 5 setting selects a medium-high Vorbis quality level. Use a value from 0 to 10; higher values generally produce larger files and better preservation of the source.

Some FFmpeg builds can decode XWM directly. If so, use:

ffmpeg -i input.xwm -c:a libvorbis -q:a 5 output.ogg

If FFmpeg reports an unsupported codec or input format, decode through MultiXwm first. Do not rename .xwm to .ogg; changing the extension does not change the encoded audio.

Quality and compatibility

XWM is normally already compressed, so XWM-to-OGG is a lossy-to-lossy conversion. Keep the original XWM or use a decoded WAV as an archival intermediate if later editing or re-encoding is expected.

Check the output's channel count, sample rate, and duration after conversion. Game assets may use unusual loop metadata or naming conventions; ordinary OGG conversion preserves the audio stream but may not preserve engine-specific loop points, tags, or playback instructions.