MP3 to OGG converter

1. 1

   Add the MP3

   Drop the file or choose it. OGG is already selected.

2. 2

   Convert

   The MP3 is decoded and encoded to Vorbis in your browser, which takes a second or two for a song.

3. 3

   Download

   Play the OGG to check it, then download it.

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.

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.

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

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

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

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

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.

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.