OGG to MP3 Converter

OGG files hold Vorbis or Opus audio: the format of many games, Android notification sounds, Linux apps, Wikipedia recordings and voice messages. Some players, cars and upload forms only take MP3, so this tool converts OGG to MP3 right in your browser, with the title, artist, album and cover art carried over. Nothing is uploaded.

How to use this tool

1. Choose one or more .ogg, .oga or .opus files.
2. Pick the MP3 quality: 192 kbps for music, 128 kbps for speech.
3. Optionally switch to mono for voice recordings.
4. Press Calculate and download the MP3 files, one by one or as a ZIP.

Formula

MP3 size (bytes) ≈ bitrate (kbps) × 1000 ÷ 8 × length (s)

Chrome, Edge and Firefox decode OGG Vorbis and Opus themselves, and the LAME encoder writes the MP3, so no download is needed. When the browser cannot decode a file (some Safari versions, OGG FLAC or unusual files), the ffmpeg engine does it instead (about 30 MB, downloaded once). Vorbis and Opus comments become ID3v2.3 tags, and an embedded cover (METADATA_BLOCK_PICTURE) becomes the MP3's front cover.

Example

A 3-minute OGG Vorbis song at about 160 kbps is roughly 3.6 MB. As an MP3 at 192 kbps it becomes 192,000 ÷ 8 × 180 = 4.32 MB; at 128 kbps it would be 2.88 MB.