Convert Opus to FLAC Online Free
Convert your .opus files to .flac format. Free, fast, and processed entirely in your browser — your files never leave your device.
What is Opus?
Opus Interactive Audio Codec (.opus) — Opus is a modern, open-source audio codec designed for the internet. It excels at both voice and music, and is the standard codec for WebRTC, Discord, and WhatsApp calls.
What is FLAC?
Free Lossless Audio Codec (.flac) — FLAC is an open-source lossless audio codec. It compresses audio without losing any quality, resulting in files about 50-60% the size of WAV while preserving every detail.
Opus vs FLAC
| Feature | Opus | FLAC |
|---|---|---|
| Full Name | Opus Interactive Audio Codec | Free Lossless Audio Codec |
| Compression | Lossy | Lossless |
| Typical Bitrate | 32-128 kbps | 600-1,000 kbps |
| Best For | Voice calls, VoIP, real-time audio, low-bandwidth streaming | Audiophile music collections, archiving, high-fidelity playback |
| File Extension | .opus | .flac |
Frequently Asked Questions
Is converting Opus to FLAC free?
Yes, completely free. The conversion runs entirely in your browser using WebAssembly — your files never leave your device and no sign-up is required.
Will I lose audio quality converting Opus to FLAC?
Converting from lossy Opus to lossless FLAC will not restore lost audio data, but it will preserve the existing quality without further degradation.
What is the maximum file size?
You can convert audio files up to 100MB. Since the conversion happens in your browser, processing speed depends on your device's performance.
Is my audio file uploaded to a server?
No. All format conversion is processed locally in your browser using FFmpeg WebAssembly. Your files never leave your device, ensuring complete privacy.