MP3 – MPEG-1 Audio Layer III
MP3 (MPEG-1 Audio Layer III) is a widely used audio format supported by this browser-based converter.
Choose an MP3 file to convert to an Opus file. Works completely in your browser. Free and no ads.
Drop your MP3 file here or choose one from your device
Quick guide
MP3 (MPEG-1 Audio Layer III) is a widely used audio format supported by this browser-based converter.
Opus (Opus Audio) is a widely used audio format supported by this browser-based converter.
Convert audio and video files to text in seconds. 3 free transcripts every day.
Upload MP4, MOV, WebM, AVI. Download DOCX, TXT, SRT (subtitles).
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Quick guide
Select or drag your MP3 file from your device into the converter.
Choose Opus as the output format, then start the local browser conversion.
Save the finished Opus file to your device.
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Transcribe audio and video to accurate text in seconds.
Choose your MP3 file, select Opus, and click Convert. When processing finishes, download the converted file.
Yes. This converter is free to use, with no account, subscription, or ads.
No. Conversion runs locally in your browser, so your media file stays on your device.
The converter re-encodes the selected audio and creates a file in Opus format.
The converter works in current desktop browsers on Windows, macOS, Linux, and ChromeOS. Performance depends on file size and device hardware.