MP3 to Opus Converter
Convert MP3 audio to the highly efficient Opus format — right in your browser.
Opus is a modern, open codec that delivers excellent quality at very low bitrates, which is why it's used by Discord, WhatsApp voice notes, and web streaming.
This tool re-encodes your MP3 to Opus locally. Nothing is uploaded.
How to convert MP3 to Opus
- 1Drop your MP3 file into the area above — or click to browse.
- 2The output format is already set to Opus. Adjust the quality settings if the format supports them.
- 3Click convert, then download your Opus file. Everything runs locally — nothing is uploaded.
Frequently asked questions
Opus produces smaller files than MP3 at similar quality, which is ideal for voice, podcasts, and bandwidth-limited use. Some older devices don't support it, though.
Yes — at 128 kbps and above, Opus is transparent for most music while staying smaller than the equivalent MP3.
No. All processing happens entirely in your browser. Your data never leaves your device — nothing is uploaded to any server.
Yes. Once the page has loaded, the tool works completely offline. For the best experience, install PrivaDeck as a PWA from your browser.
Other conversions
Need a different format?
Open the full audio converter to pick from MP3, WAV, OGG, AAC, FLAC, M4A and Opus, convert in batches, and adjust bitrate, sample rate and channels.
Open the full Audio Converter