Convert Opus to MP3 Online Free
Convert your .opus files to .mp3 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 MP3?
MPEG Audio Layer 3 (.mp3) — MP3 is the most widely used audio format. It uses lossy compression to reduce file size while maintaining acceptable sound quality, making it ideal for music streaming and portable devices.
Opus vs MP3
| Feature | Opus | MP3 |
|---|---|---|
| Full Name | Opus Interactive Audio Codec | MPEG Audio Layer 3 |
| Compression | Lossy | Lossy |
| Typical Bitrate | 32-128 kbps | 128-320 kbps |
| Best For | Voice calls, VoIP, real-time audio, low-bandwidth streaming | Music playback, podcasts, sharing audio files |
| File Extension | .opus | .mp3 |
Frequently Asked Questions
Is converting Opus to MP3 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 MP3?
Both Opus and MP3 use lossy compression. There may be a slight quality loss from re-encoding. If possible, convert from the original lossless source.
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.