Convert WAV to Opus.
WAV into tiny Opus files — peak efficiency, run locally.
Drop WAV files here
or browse your files
Paste with ⌘V · or drop files anywhere on the page
Files never leave your device. Everything runs in your browser, nothing touches a server — tools you've used even work offline.
Convert WAV audio to Opus right in your browser — the most efficient lossy codec in wide use, encoded locally. Voice recordings collapse from megabytes to almost nothing; music holds up at bitrates MP3 cannot touch.
How it works
- Drop files anywhere on the page, click to browse, or paste with ⌘V.
- Pick a quality or preset — or set an exact target size and let the tool find it.
- Compress, compare before/after, and download — individually or as a ZIP.
What Opus is unreasonably good at
Opus wins listening tests at every bitrate: speech is clean at 32–64 kbps, music rivals higher-rate MP3 at 96–128 kbps. That makes it the right target for voice notes, podcasts, streaming and game audio — WhatsApp voice messages are Opus already. For a lossless archive use WAV to FLAC; when a legacy player must open the file, WAV to MP3 stays the compatibility pick.
The Opus bitrate ladder
Opus was designed to be chosen by content, not by superstition — each step down the ladder buys real megabytes:
| Content | Bitrate | An hour is roughly |
|---|---|---|
| Voice memo, dictation | 32 kbps | 14 MB |
| Podcast, interview | 48–64 kbps | 22–29 MB |
| Music, everyday listening | 96 kbps | 43 MB |
| Music, critical ears | 128–160 kbps | 58–72 MB |
Frequently asked questions
What plays .opus files?
Browsers, VLC, modern phones and every messaging platform. Older car stereos and iTunes-era software may refuse them — MP3 remains the safe pick for legacy gear.
What bitrate should I pick for voice?
32–64 kbps sounds clean for speech — an hour of voice lands around 15–30 MB. Music is comfortable at 96–128 kbps.
Is Opus really better than MP3?
At the same bitrate, clearly — especially below 128 kbps, where MP3 degrades audibly and Opus stays composed. That efficiency is why voice platforms adopted it.
Is it private?
Yes. The audio is decoded and re-encoded entirely in your browser — recordings never leave your device, and the server does nothing but deliver this page. Voice memos, interviews, demos: none of it is uploaded anywhere. Want proof? Run one file through, switch your connection off, and run another — it still works.