Converting OGG to Opus gives you the same content in a different container. It runs in your browser: nothing is uploaded, there is no queue and no size limit.
What changes when you convert OGG to Opus
- Both OGG and Opus are lossy. Every re-encode discards a little more detail, so convert from the original when you can and keep the quality setting at 85 or above.
- Opus does not carry metadata: EXIF, GPS, camera settings and tags are dropped. That is a privacy feature as often as it is a loss.
When to convert, and when not to
Convert to Opus for voice, podcasts, low-bandwidth streaming. The best quality per kilobyte, especially for speech. What WhatsApp and Discord use.
Keep OGG for games and open-source software. Free and open lossy audio.
How to convert OGG to Opus
- Drop your OGG file on the converter above, or click to choose. Several at once is fine.
- Check the options if you need them: audio bitrate.
- Click Convert, then Download. Nothing was sent anywhere, your browser did the work.
Questions
Is my OGG file uploaded?
No. The conversion runs in your browser with WebAssembly. There is no upload endpoint on this site. You can open your browser's Network tab, or go offline after the page loads, and it still works.
Is there a file size limit?
No fixed one. The limit is your device's memory: a large audio file on a phone is slower than on a laptop, but nothing is rejected for being big.
Is it free?
Yes, without an account, without a daily cap and without a watermark. Your device does the computing, so there is no server bill to pass on.
Will the quality drop?
Opus is lossy, so a little detail is traded for a smaller file. At quality 85 the difference is invisible on photos. For graphics with sharp edges, prefer a lossless format such as PNG.
Can I convert several files at once?
Yes. Drop them all; each is converted in turn and you can download them one by one or as a single ZIP.
Which engine does the conversion?
Media engine (FFmpeg, multithreaded WebAssembly), compiled to WebAssembly and running in your browser, on all your CPU cores when the browser allows it. First use downloads about 31 MB, cached afterwards.