Turn OPUS audio files into FLAC. It is converted in your browser, so the file never leaves your device.
Drop OPUS files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop OPUS files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the FLAC, or download everything as one ZIP if you converted several files.
The OPUS to FLAC converter is part of this page and runs inside your browser. Your audio files are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
Opus files do not open in many music apps, editors or hardware players. FLAC keeps full quality at about half the size of WAV. OPUS is at home in voice and music at low bitrates; FLAC is the usual choice for archiving music at full quality. FLAC cannot bring back detail that OPUS compression already removed; it simply stores the result without further loss, in a larger file.
The defaults suit most files. Under Options you can trim the start and end.
The conversion uses your browser's own video and audio codecs (WebCodecs), with hardware acceleration where the device has it; the file is read from disk as it goes and can be up to 2 GB. Where the browser lacks a codec, the page falls back to the compatibility engine.
Opus is a modern open codec that sounds good at very low bitrates. WhatsApp voice notes, Discord and video calls use it. Standalone .opus files are less widely supported than the codec itself.
Opens in Current browsers, Android, VLC; many music apps and hardware players do not
OPUS converterFLAC compresses audio to roughly half the size of WAV without losing anything, like a ZIP for sound. It is the standard for lossless music collections. Apple's Music app is the notable holdout.
Opens in Android, Windows, VLC, most hi-fi players; Apple Music does not import it
FLAC converter| OPUSOpus audio | FLACFLAC audio | |
|---|---|---|
| Stands for | Opus | Free Lossless Audio Codec |
| Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Introduced | 2012, by the Internet Engineering Task Force (with Xiph.Org, Mozilla and Skype) | 2001, by Josh Coalson and the Xiph.Org Foundation |
| Opens in | Current browsers, Android, VLC; many music apps and hardware players do not | Android, Windows, VLC, most hi-fi players; Apple Music does not import it |
| Best for | Voice and music at low bitrates | Archiving music at full quality |
| File extension | .opus | .flac |
No. The OPUS to FLAC conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
No further quality is lost: FLAC stores the decoded audio exactly. It cannot restore what OPUS compression already discarded, and the file will be larger.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the OPUS file, press Convert and save the FLAC. There is nothing to install.
Yes. Files up to 2 GB are accepted. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.