What happens when you convert Opus to FLAC
- FLAC is lossless, so nothing more is lost, but quality already removed by Opus compression doesn't come back. Files are much bigger.
- FLAC files are saved as 16-bit audio, the same quality as a CD.
- Mono and stereo are kept (or choose either); surround sound is mixed down to stereo.
- Tags such as title, artist and cover art aren't copied yet.
Opus vs FLAC
| Feature | Opus | FLAC |
|---|---|---|
| Compression | Lossy | Lossless |
| Size per minute | 1 MB | 5–6 MB |
| Plays on | Browsers, Android, VLC | Most devices and apps |
| Best for | Voice, podcasts, web | Archiving, hi-fi listening |
How to convert Opus to FLAC
- Drop your Opus files on the box above, or click it to choose files. You can add many at once.
- Adjust the options if you want. The defaults work well for most files.
- Click Download for each FLAC file, or "Download all" to get a ZIP.
Frequently asked questions
Is it safe to convert my files here?
Yes. Conversion happens entirely in your browser. Your files are never uploaded to a server, so nobody else can see them.
Is it free? Are there limits?
It's completely free, with no sign-up, watermarks or daily limits. The only limit is your device's memory for very large files.
Can I convert many Opus files at once?
Yes. Drop as many files as you like; they're converted one after another and you can download them all as a ZIP.
Will converting Opus to FLAC reduce quality?
No. FLAC is lossless, so nothing more is lost. It can't restore detail that Opus compression already removed.
Why is the FLAC file so much bigger than the Opus?
Opus uses lossy compression to keep files small. FLAC stores the audio without that compression, so it needs more space.
Are tags and cover art kept?
Not yet. The sound is converted, but title, artist and album art aren't copied.