Compress OGG
Make OGG files smaller, or switch to Opus for the best quality at low bitrates.
MP3, WAV, M4A, FLAC, OGG, Opus, AIFF, WMA, AMR and the sound of most videos. Files stay on your device.
How it works
- Choose your OGG or Opus files.
- Pick a lower quality or bitrate.
- Click Compress and compare sizes.
- Download the smaller files.
Vorbis or Opus
OGG files hold Vorbis or Opus audio. Both are lossy and open. Opus is the more efficient: at 64 kbps or below it sounds clearly better than Vorbis, and it was designed for speech and low bitrates. Vorbis is older and plays in more devices and game engines. Choose Format: Opus to make the smallest files, or OGG (Vorbis) to stay in the classic format.
The Quality presets are 112 kbps for Vorbis and 64 kbps for Opus at Medium, with Low and High on either side. Opus always runs at 48 kHz, which the tool reports when it resamples.
Staying under a size
Target size works well for both: the bitrate can be set finely, so the result lands within a few percent of your number. For long recordings, Opus keeps speech understandable down to about 12 kbps in mono, so it is the best choice when the size is tight. Check that your player supports Opus first: not every older device plays it.
Questions
Is Opus better than OGG Vorbis?
At the same bitrate, yes, especially below 96 kbps. Vorbis is more widely supported in older software and hardware.
What file extension do I get?
OGG (Vorbis) gives .ogg. Opus gives .opus, which is Opus audio in an Ogg container.
Does it keep tags?
Yes, by default, including cover art. You can remove them under More options.
Is my audio uploaded?
No. Compression runs in your browser on your device. The only downloads are the page itself and, the first time you use a format, a small encoder file from this site.