Accurately convert
Vietnamese OPUS files to text
Sonix automatically transcribes your Vietnamese OPUS files to text in minutes. Access industry-leading artificial intelligence and the days of manually transcribing your Vietnamese OPUS files are long gone. Vietnamese speech to text: Sonix has been independently reviewed the most accurate Vietnamese automated transcription, translation, and subtitling platform.
Free to start — no credit card required.
Thousands of Sonix customers convert their Vietnamese OPUS files to text
Use Sonix to quickly convert
Vietnamese OPUS files to text
- 1Log into your Sonix account~30 sec
If you don't have one, you can sign up for Sonix's free account — Your free trial includes 30 minutes of transcription and translation.
- 2Upload your Vietnamese OPUS file~1 min
Click “Upload” and locate the Vietnamese OPUS file on your computer.
- 3Choose language: Vietnamese~10 sec
Select Vietnamese as the language spoken, then click “Transcribe”.
- 4Sonix transcribes your OPUS file~5 min
Sonix transcribes your Vietnamese OPUS file and converts it to Vietnamese text.
- 5Polish your Vietnamese transcript~2 min
Edit your Vietnamese transcript directly in the browser to correct any misheard words.
- 6Export Vietnamese text~10 sec
Export the Vietnamese text to MS Word, PDF, subtitles, or plain text.
Understanding Vietnamese OPUS files
Vietnamese has three major regional varieties: Northern (centered on Hanoi), Central (around Huế), and Southern (around Ho Chi Minh City). They differ in tone realization and consonant pronunciation — Northern speech distinguishes six tones while Southern speech merges two of them — so knowing which region your speakers come from helps when reviewing a transcript.
OPUS technical specifications
- Codec
- Opus (SILK + CELT)
- Container
- Ogg
- Typical bitrate
- 6–510 kbps (VBR)
- Sample rate
- 8–48 kHz
- Compression
- Lossy
Vietnamese at a glance
- Speakers
- ~85–90 million speakers worldwide
- Writing system
- Latin alphabet (chữ Quốc ngữ) with diacritics marking tones and vowels
- Say hello
- Xin chào
Frequently asked questions
How to improve the accuracy of your Vietnamese transcripts?
Start by improving the quality of the Vietnamese OPUS file that you upload to Sonix. Please use high quality recording equipment, recording in a quiet environment, and ensure that your speakers are speaking clearly to ensure that your transcript is as accurate as possible.
Any advice for the Vietnamese OPUS file that I upload?
Yes, please do not over-compress or over-filter the audio track of your Vietnamese OPUS file. By uploading a high quality version of your audio, we can give you the best level of accuracy.
Aside from OPUS, do you support other types of audio/video files?
Yes, we do! You can convert the following file types in Vietnamese with Sonix:
Why won't my OPUS file play on my computer?
Older media players and some built-in OS players lack Opus support. Opening the file in VLC or a modern web browser, or converting it to MP3 or WAV, usually resolves the issue.
Are WhatsApp voice messages OPUS files?
Yes, WhatsApp exports voice notes as .opus files. You can upload them for transcription directly without converting them first.
Can Sonix transcribe Vietnamese audio and video files?
Yes. Upload your audio or video file, select Vietnamese as the spoken language, and Sonix generates a transcript you can edit in the browser and export in formats such as DOCX, PDF, and SRT.
Does Vietnamese transcription include tone diacritics?
Transcripts are written in standard Vietnamese orthography (chữ Quốc ngữ), which includes the tone and vowel diacritics. You can correct any misplaced marks in the built-in editor before exporting.
Does Sonix handle Northern and Southern Vietnamese accents?
You select Vietnamese as a single language, and the transcript covers speech from different regions. Because regional pronunciation varies, it is worth reviewing recordings with strong Central or Southern accents in the editor before export.
Trusted by professionals worldwide
I love, love, love this service! Sonix is amazing! I plan to use the transcripts I've gotten so far to update the content of my podcast so that it will aid in SEO on my website. Very, very useful!
Wow. SPEED. Nice format, easy to read, liked the time stamps and speaker notification. Not a lot of formatting I had to strip before using. Simple.
More ways to convert & transcribe
Jump straight to a related format, language, or tool — every link below is a real page.
