Audio
Turn your MP3 files into OGG in seconds. Everything happens in your browser: nothing is uploaded to any server.
Drag your files here
Or paste them with Ctrl+V. They never leave your device.
It loses some quality with each re-encode and, at the same size, sounds worse than AAC or Opus. As OGG (with Opus) it is small and suits games, websites and free software.
MP3 compresses sound lossily, removing what the ear barely notices, so a song takes just a few megabytes.
Strengths: Any phone, car, speaker, player or program plays it, however old.
Limits: It loses some quality with each re-encode and, at the same size, sounds worse than AAC or Opus.
OGG is an open, patent-free container; it traditionally carries Vorbis audio and, when converting here, Opus.
Strengths: Video games, Wikipedia and many free programs use it, and it compresses very well.
Limits: iPhones and some old or car players cannot open it.
No. The MP3 to OGG conversion runs entirely in your browser, with code downloaded from this site and executed on your device. You can check it in the Network tab of the developer tools or by going offline after the page loads.
A little, because OGG is lossy; at 192 kbps or more the difference is hard to hear.
Up to 2 GB on desktop and 500 MB on mobile (less on low-memory devices), and up to 12 hours of audio on desktop. If it is over, you are told before it starts.
Yes. Drop as many MP3 files as you like: several are converted at the same time, depending on your processor cores, and when they finish you can download each OGG or all of them in a ZIP.