# MP3 to OGG converter: free, in your browser, no upload

> Convert MP3 to OGG in your browser. The MP3 is encoded to Ogg Vorbis, the kind Godot and other game engines import, at about 160 kbps. Nothing is uploaded.

URL: https://cutfac.com/tools/mp3-to-ogg  
Last updated: 2026-10-28  
Language: [한국어](https://cutfac.com/ko/tools/mp3-to-ogg)

Drop in an MP3 and get an Ogg Vorbis file for a game, an engine such as Godot, or any app that asks for OGG. The file never leaves your browser.

Runs in your browser. Nothing is uploaded.

## How to use it

1. **Add the MP3.** Drop the file or choose it. OGG is already selected.
2. **Convert.** The MP3 is decoded and encoded to Vorbis in your browser, which takes a second or two for a song.
3. **Download.** Play the OGG to check it, then download it.

## Vorbis, the OGG most software expects

Ogg is a container, and an .ogg file usually holds Vorbis sound. That's what this tool writes, and what Godot imports alongside WAV and MP3.

Ogg can also hold Opus, which is usually saved as .opus. Godot's import list doesn't include Opus, so a game or engine that asks for OGG wants Vorbis.

## Quality and file size

The OGG is encoded at Vorbis quality 5, which Hydrogenaudio puts at about 160 kbps. Vorbis varies the rate with the sound: music comes to about 1.2 MB a minute, and a single tone to much less.

The sample rate and mono or stereo stay as the MP3 had them. Both formats are lossy, so the OGG doesn't sound better than the MP3. If you have the original WAV or FLAC, convert that instead.

## With ffmpeg

ffmpeg makes the same file with libvorbis. If it answers "Unknown encoder 'libvorbis'", your build lacks it, as Homebrew's does; ffmpeg's own vorbis encoder is experimental, needs -strict -2 and only takes stereo.

- ffmpeg -i song.mp3 -codec:a libvorbis -q:a 5 song.ogg

## Sources

- [Godot docs: Importing audio samples](https://docs.godotengine.org/en/stable/tutorials/assets_pipeline/importing_audio_samples.html)
- [Hydrogenaudio: Recommended Ogg Vorbis settings](https://wiki.hydrogenaud.io/index.php?title=Recommended_Ogg_Vorbis)
- [MDN: Web audio codec guide](https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Audio_codecs)

## Questions

### Is my audio uploaded?

No. The MP3 is decoded and the OGG is written in your browser. Nothing is sent anywhere.

### Is the OGG Vorbis or Opus?

Vorbis, the codec games and engines expect in an .ogg file. Godot, for one, imports Ogg Vorbis but doesn't list Opus.

### Will it sound better than the MP3?

No. Both are lossy, so the OGG can only keep what the MP3 has, and encoding again loses a little more.

### How big will the OGG be?

About 1.2 MB a minute for music, often a little smaller than a 192 kbps MP3. Quiet or simple sounds come out smaller still.

### Can I convert other audio to OGG?

Yes. M4A, WAV and FLAC files work too, as long as your browser can play them. A file that's already Ogg Vorbis is copied as it is.