Turn FLAC audio files into OPUS. It is converted in your browser, so the file never leaves your device.
Drop FLAC 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 FLAC 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 OPUS, or download everything as one ZIP if you converted several files.
The FLAC to OPUS 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.
FLAC files are large, and Apple Music, many car stereos and older players will not play them. Opus sounds better than MP3 or AAC at low bitrates. FLAC is at home in archiving music at full quality; OPUS is the usual choice for voice and music at low bitrates. OPUS is lossy, so keep the FLAC original if you may need full quality later.
The defaults suit most files. Under Options you can choose the bitrate and 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 written at 128 kbps unless you choose another bitrate.
FLAC 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 converterOpus 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 converter| FLACFLAC audio | OPUSOpus audio | |
|---|---|---|
| Stands for | Free Lossless Audio Codec | Opus |
| Type | Audio | Audio |
| Compression | Lossless | Lossy |
| Introduced | 2001, by Josh Coalson and the Xiph.Org Foundation | 2012, by the Internet Engineering Task Force (with Xiph.Org, Mozilla and Skype) |
| Opens in | Android, Windows, VLC, most hi-fi players; Apple Music does not import it | Current browsers, Android, VLC; many music apps and hardware players do not |
| Best for | Archiving music at full quality | Voice and music at low bitrates |
| File extension | .flac | .opus |
No. The FLAC to OPUS conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
OPUS is a lossy format, so a small amount of detail is traded for a smaller file. At the default setting the difference is hard to notice. You can choose the bitrate under Options.
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 FLAC file, press Convert and save the OPUS. 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.