Free online OPUS to DOCX converter
Transcribe OPUS audio into an editable DOCX document.
Convert OPUS to DOCX online - free
Your file is processed instantly and deleted as soon as you download it.
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How it works
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Upload your .opus file
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Perform .opus to .docx conversion
After successful file upload, click to convert when you are ready.
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How to convert opus to docx file
- Audio to text
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101convert.com assistant bot
1h
What the OPUS format is
OPUS is a lossy audio codec designed for speech and music, commonly stored in files with the .opus extension. Voice-messaging apps, internet calling software, screen-recording tools, and some browser-based recording systems use it because it provides clear speech at relatively small file sizes.
An OPUS file contains an audio waveform, not a text layer. Renaming recording.opus to recording.docx does not convert it, and ordinary document converters cannot produce a transcript without speech-recognition processing.
What the DOCX format is
DOCX is the XML-based document format used by Microsoft Word and supported by LibreOffice Writer, Google Docs, and other word processors. A DOCX transcript can contain paragraphs, headings, timestamps, speaker labels, tables, and basic formatting.
Choose DOCX when the result needs proofreading, editing, comments, collaboration, printing, or long-term access in common office software. It is generally more suitable for a transcript than a plain TXT file because it preserves document structure and formatting.
How to convert OPUS to DOCX
Using the online converter
- Open the OPUS-to-DOCX converter on 101convert.com.
- Upload the
.opusrecording. - Start the conversion and wait for speech recognition to generate the transcript.
- Download the resulting
.docxfile and open it in Word or LibreOffice Writer. - Check names, numbers, punctuation, speaker changes, and words affected by background noise before sharing the document.
This option requires no installed software and can convert the recording to an editable document for free. Do not upload confidential recordings unless the service's current privacy terms meet your requirements.
Using desktop tools
For local processing, first decode the OPUS audio with FFmpeg:
ffmpeg -i recording.opus recording.wav
Run a speech-recognition tool such as OpenAI Whisper against the WAV file:
whisper recording.wav --model medium --language en --output_format txt
Open the generated recording.txt in LibreOffice Writer, correct the transcript, then select File → Save As, choose Word 2007–365 (*.docx), and save it as transcript.docx. Whisper's small, medium, and large models trade processing speed and memory use for recognition accuracy; set --language when the recording's language is known.
Quality and compatibility limits
This conversion has two separate stages: decoding the OPUS audio and recognizing speech. Decoding is normally lossless relative to the compressed source, but transcription accuracy depends on pronunciation, overlapping speakers, microphone quality, noise, accents, and language support.
Converting OPUS to WAV does not improve speech quality; it only creates an uncompressed working file for software that does not accept OPUS directly. DOCX output may contain plain paragraphs rather than reliable speaker identification or timestamps, depending on the transcription tool. Review the document manually, especially for proper names, technical terms, dates, amounts, and legal or medical content.
Note: This opus to docx conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
OPUS vs DOCX: format comparison
How the OPUS and DOCX formats compare on the properties that matter most for this conversion.
| Property | .OPUS Opus | .DOCX Microsoft Word Open XML Document |
|---|---|---|
| Open standard | Yes | Yes |
| Compression | Lossy | Lossless |
| Typical file size | Small | Small |
| Opens in a web browser | Yes, natively | No |
| Further editing | Limited | Easy |
| Metadata support | Extensive | Extensive |
| Plain-text readable | No | No |
| Best used for | Streaming | Editing and post-production |
| Introduced | 2012 | 2007 |
| Developer | Xiph.Org Foundation | Microsoft Corporation |
| MIME type | audio/opus | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
Frequently asked questions
Is the OPUS to DOCX converter free?
Yes, converting OPUS to DOCX on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my OPUS file be?
You can upload OPUS files up to 200 MB and convert up to 1 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert OPUS to DOCX?
No. The OPUS to DOCX conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid OPUS file for this OPUS to DOCX conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.