Convert Audio & Video to OPUS Online — Free OPUS Converter
Use this free online OPUS converter to transform audio and video files from a wide range of formats into the efficient OPUS audio format — no software installation or account required, right in your browser.
What is the OPUS audio format?
OPUS is an open, royalty-free audio codec developed by the Xiph.Org Foundation and standardized by the IETF (RFC 6716). It combines the strengths of two earlier codecs — SILK (originally from Skype, optimized for speech) and CELT (optimized for music and general audio) — into a single, highly versatile format. OPUS operates at bit rates from 6 kbps up to 510 kbps and supports sample rates from 8 kHz (narrowband) to 48 kHz (fullband), making it suitable for everything from voice calls to high-fidelity music streaming.
The codec is natively supported by all major browsers (Chrome, Firefox, Edge, Safari) as well as platforms like WebRTC, Discord, YouTube, and many open-source media players including VLC and FFmpeg.
Why convert to OPUS?
OPUS consistently outperforms older codecs at equivalent bit rates, delivering excellent audio quality at smaller file sizes. Common reasons to convert to OPUS include:
- Smaller files: OPUS typically produces smaller files than MP3 or AAC at the same perceived quality, saving storage and bandwidth.
- Web and streaming use: OPUS is the recommended codec for WebRTC-based applications (video calls, voice chat) and is widely used in streaming services.
- Open standard: No licensing fees or patent restrictions, making it ideal for open-source projects and self-hosted applications.
- Low latency: OPUS has an algorithmic delay as low as 5 ms, which is critical for real-time communication applications.
- Broad compatibility: Widely supported across browsers, mobile platforms (Android, iOS), and desktop media players.
Supported input formats
The converter accepts a broad range of audio and video input formats, including but not limited to MP3, WAV, FLAC, AAC, OGG, WMA, M4A, AIFF, RA, MP2, ALAC, as well as common video formats such as MP4, AVI, MOV, MKV, and WEBM. You can upload a file from your device or provide a direct URL to a remote file for conversion.
Frequently asked questions
Is this OPUS converter free to use?
Yes, the OPUS converter on Conversion-Tool.com is completely free. There is no subscription, no signup, and no hidden fee required to convert your files.
What file formats can I convert to OPUS?
You can convert from a wide range of audio formats (MP3, WAV, FLAC, AAC, OGG, WMA, M4A, AIFF, and more) as well as video formats (MP4, AVI, MOV, MKV, WEBM, and others). The tool extracts and re-encodes the audio track to OPUS.
How do I convert a file to OPUS online?
Simply select a local file from your device or paste a remote file URL into the tool, then click the convert button. Once processing is complete, you can download the resulting OPUS file directly.
What happens to my files after conversion?
Uploaded and converted files are processed on the server and then deleted automatically. Your files are not stored permanently or shared with third parties.
Is OPUS better than MP3 or AAC?
In most listening tests, OPUS delivers comparable or better audio quality at the same or lower bit rate compared to MP3 and AAC. It is particularly efficient for speech and low-bit-rate audio. However, MP3 and AAC have broader compatibility with older hardware and software.