How do I convert my OPUS files to subtitles with automated transcription? 
Sonix uses the best speech-to-text algorithms to convert your audio files (*.opus) to subtitles. Just follow these six easy steps:
Step 1
Sign up for a free Sonix trial account—includes 30 minutes of free OPUS to subtitles conversion.
Step 2
Upload the Opus Audio File file(s) (*.OPUS) from your computer, Dropbox, Google Drive, or by dragging it on the page.
Step 3
Choose the language spoken in the uploaded OPUS file. We support over 50 different languages including English, Spanish, German, and French. Then click the 'Start Transcribing Now' button.
Step 4
Sonix will then automatically transcribe the audio from your OPUS file and convert it to a simple text format. Grab some tea, it will take only a few minutes.
Step 5
Use the Sonix AudioText Editor to polish your transcript before we convert it to a subtitle. It's like a word processor: simply type in your browser to correct any words.
Step 6
Click the 'Export' button. Choose either 'Subrip subtitle file (.srt)' or 'WebVTT file (.vtt)' from the dropdown to download the subtitle version of your OPUS file. You can also adjust the character length and time duration length of each subtitle.
That's it! Your OPUS file has now been converted to subtitles and is ready for the next step in your workflow!
Thousands of incredible customers create subtitles from their OPUS files with Sonix 
Frequently Asked Questions for Opus Audio File (*.OPUS) to subtitle 
What is a OPUS file?
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.
Does Sonix transcribe audio files with a *.OPUS file extension?
Yes, Sonix does automatically transcribe audio files with a .OPUS file extension. Sonix is an online audio to text converter. Convert any audio (opus, mp3, m4a, wav, ...) or video (mp4, mov, avi, ...) file to text without installing any software! Sonix quickly and accurately transcribes *.OPUS files and converts them to text in a subtitle format.
Know anyone who needs to convert Opus Audio File (.OPUS) to subtitle?
We'd appreciate it if you tell them about Sonix—the best way to convert OPUS to subtitle.
Other ways to convert your OPUS audio files with Sonix
OPUS to text
Use the most accurate speech-to-text technology to convert files: OPUS to text.
OPUS to docx
Accurately transcribe your OPUS file to Microsoft Word Format (docx) so you can bring the transcript into your workflow.
OPUS to PDF
Easily transcribe your OPUS file to Adobe's Portable Document Format (pdf) so you can share them with colleagues.
OPUS to srt
Quickly create subtitles from your OPUS files and save them as SRTs, one of the most widely supported subtitle formats.
OPUS to VTT
Create more advanced captions for your OPUS files by using the latest caption format VTT (Video Text Tracks).
OPUS to captions
Quickly and easily create closed captions for your OPUS files so you can embed them in your video files.
Convert Opus Audio File to subtitles (SRT & VTT) with Sonix 
Sonix automatically transcribes and translates your audio/video files in 50+ languages. Easily search, edit, and share your media files. Sonix is an online, fully-automated speech to text service that quickly converts Opus Audio File files to subtitles. Fast, accurate, and affordable. Millions of users from all over the world.
Includes 30 minutes of free transcription
