OPUS to FLAC Converter
Convert Opus Interactive Audio Codec (OPUS) to Free Lossless Audio Codec (FLAC) online for free. Runs 100% in your browser. Files never leave your device. No signup, no watermarks, no limits.
Drag & drop files here
or
Choose filesProcessed on your device. Nothing is uploaded
How to OPUS to FLAC convert files
- 01Add your files
Click “Choose Files” or drag and drop them onto the page. Batch conversion is supported.
- 02Adjust settings
Pick quality, size or other options. Sensible defaults are pre-selected.
- 03Convert & download
Hit Convert and download your files. Everything runs locally. Nothing is uploaded.
What is a OPUS (Opus Interactive Audio Codec) file?
Opus is a modern, open codec optimized for both speech and music at very low bitrates. It powers Discord, WhatsApp voice messages and much of WebRTC.
- Developed by
- IETF / Xiph.Org
- Initial release
- 2012
What is a FLAC (Free Lossless Audio Codec) file?
FLAC compresses audio losslessly to 50–70% of the original size while keeping every bit of the source. It is the audiophile standard for music archiving.
- Developed by
- Xiph.Org Foundation
- Initial release
- 2001
Frequently asked questions
How do I convert OPUS to FLAC?
Click “Choose Files” or drag your OPUS file onto the page, optionally adjust the settings, then hit Convert. Your FLAC file downloads straight from your browser. Nothing is uploaded anywhere.
Is this OPUS to FLAC converter free?
Yes, completely free with no hidden limits, watermarks or signup. Because all processing happens on your own device, there are no server costs to pass on to you.
Are my files uploaded to a server?
No. The conversion engine runs entirely in your web browser using WebAssembly. Your files never leave your device. You can even disconnect from the internet after the page loads and keep converting.
Is there a file size limit?
We impose no fixed limit. The practical ceiling is your device's free memory, since processing happens locally. Most conversions work comfortably with files up to a few hundred megabytes, and image or document conversions handle much more.
Does it work on my phone?
Yes. The converter runs in any modern browser on Windows, macOS, Linux, Android and iOS. No app installation is required.