Convert FLAC to Opus Online Free
Convert your .flac files to .opus format. Free, fast, and processed entirely in your browser — your files never leave your device.
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.
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.
FLAC vs Opus
| Feature | FLAC | Opus |
|---|---|---|
| Full Name | Free Lossless Audio Codec | Opus Interactive Audio Codec |
| Compression | Lossless | Lossy |
| Typical Bitrate | 600-1,000 kbps | 32-128 kbps |
| Best For | Audiophile music collections, archiving, high-fidelity playback | Voice calls, VoIP, real-time audio, low-bandwidth streaming |
| File Extension | .flac | .opus |
Frequently Asked Questions
Is converting FLAC to Opus 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 FLAC to Opus?
Converting from lossless FLAC to lossy Opus will result in some quality loss due to compression. For best results, use a higher bitrate setting.
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.