Sonix is an online speech-to-text converter. We extract the speech from your OPUS file and give you an accurate text transcript in minutes.
Modern audio codec optimized for voice and streaming
The OPUS file is an audio file format that was created for use in Voice over IP (VoIP), video conferencing, or in-game chat. Since the OPUS codec is primarily used in Internet streaming applications, it isn't common. However, is it a lossy audio format that uses both SILK (used by Skype) and CELT (from Xiph.Org) codecs and supports variable bit rates from 6 kb/s to 510 kb/s.
State-of-the-art codec for voice; excellent at low bitrates
Sign up for Sonix's free trial. Includes 30 minutes of free transcription.
Upload your OPUS file from your computer, Google Drive, or Dropbox.
Choose from 53+ languages spoken in your OPUS file.
Sonix AI automatically extracts and transcribes your OPUS audio.
Polish your transcript with our browser-based AudioText Editor.
Download your OPUS transcript as a text file or other formats.
Yes! Sonix uses advanced AI to convert OPUS files to text with high accuracy. Simply upload your file, select the language, and get your transcript in minutes.
Sonix achieves up to 99% accuracy when converting OPUS files to text. Accuracy depends on audio quality and clarity of speech.
Sonix processes OPUS files 10x faster than real-time. A 30-minute recording is transcribed in about 3 minutes.
Sonix supports 53+ languages for OPUS transcription including English, Spanish, French, German, Chinese, Japanese, and many more.
Yes! Our browser-based editor lets you make corrections, add speaker labels, and polish your transcript while playing back the audio.
Export your OPUS transcript as plain text, Microsoft Word (DOCX), PDF, SRT subtitles, VTT captions, and more.
Convert OPUS to text 10x faster than real-time with our advanced AI.
Industry-leading accuracy for OPUS transcription, powered by AI.
Polish your OPUS transcript with our intuitive AudioText Editor.
Convert OPUS to text at a fraction of the cost of manual transcription.
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I was cleaning up the transcription of the recording of my Brazilian client. Sonix did a surprisingly good job. Sonix's accuracy in transcription is great.
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I have been a dialogue system researcher for half a decade now. I had build my own app for doing the transcriptions. Sonix was clearly better than what I had. I made the switch!
Try Sonix free with 30 minutes minutes of transcription. No credit card required.
AI transcription and translation in 53+ languages.
