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Upload OPUS audio files and get accurate transcripts in minutes. Perfect for voice messages and VoIP recordings.
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Supports 20+ file formats including MP3, MP4, WAV
Opus is the speech codec behind WhatsApp voice notes and many voice and video calls. WhatsApp voice messages are saved as .opus files. Upload a .opus file and Scriptivox turns the speech in it into an accurate transcript with timestamps and speaker labels, which you can edit and download as TXT, DOCX, PDF, CSV, SRT or VTT.
WhatsApp voice messages are .opus files. On an iPhone, share the voice message to Files; on Android, share it or find it in WhatsApp's Voice Notes media folder. Then upload the file here.
Leave it on auto-detect or pick one of more than 100 languages. Turn on speaker recognition when more than one person talks.
Read the transcript with timestamps, correct any word in the editor, then download it as TXT, DOCX, PDF, CSV, SRT or VTT.
| Specification | Value |
|---|---|
| Container | Ogg |
| Developed by | Xiph.Org / IETF |
| Introduced | 2012 |
| Audio codecs | Opus |
| Compression | Lossy |
| Typical bitrate | 64–256 kbps |
| Max sample rate | 48 kHz |
| Max channels | 255 |
| Gapless playback | Yes |
| Metadata / tags | Vorbis comments |
| Approx. file size | 0.48–1.44 MB per minute |
| Licensing | Royalty-free |
| Plays natively on | Native: Web browsers, Android · Needs a player: Windows, macOS, iOS |
| Best for | voice and calls, podcasts, web delivery |
Advanced AI technology meets simple, intuitive design
Powered by next-generation AI designed for seamless speech understanding worldwide
Transcripts delivered in real time and large files processed in minutes, not hours.
Your data is protected with end-to-end encryption, privacy-first safeguards, and enterprise-grade security controls.
Supports uploads of up to 10 hours, designed for uninterrupted transcription of lengthy sessions.
Global coverage with accent recognition and dialect adaptation, ensuring inclusivity worldwide.
Yes. Export or save the voice note (it's an .opus file) and upload it here. Long voice notes become text you can read in seconds.
Yes. Short messages come back in seconds, and you can upload several files at once.
You can start free, with no card, and transcribe short files every day. Pro adds unlimited transcriptions and files up to 10 hours or 5 GB each.
Yes. Turn on speaker recognition and each part of the transcript is labelled with its speaker, so interviews and meetings read like a script.
More than 100, from English, Spanish and Hindi to Arabic, Japanese and Swahili. Leave the language on auto-detect, or choose it for the best result on short files.
Files are transcribed many times faster than they play, so most are ready in a few minutes. Long recordings take a little longer, and you can close the page while they run.
Join thousands of users who trust Scriptivox for their transcription needs