Opus to text
Opus is the codec behind WhatsApp and Telegram voice messages. Upload a Opus file and get an accurate transcript you can download as TXT, SRT or VTT.
One step to your transcript
We'll email you a sign-in link — no password. Keep this tab open; your file starts automatically.
- 1Extract audio
- 2Upload
- 3Transcribe
Up to 10 hours per file
Audio is deleted right after transcription
- 3 free files every day
- No credit card
- 90+ languages
How it works
From recording to text in three steps
- 1
Upload
Drop in any audio or video file. The audio track is extracted in your browser, so even large videos upload quickly.
- 2
Transcribe
Our AI transcriber turns the speech into text with timestamps and groups it into readable paragraphs. You can close the tab while it works.
- 3
Use it
Copy the text, search it, or download TXT, SRT or VTT. The audio is deleted once the transcript is ready.
The result
A clean transcript, not a wall of words
Read it as paragraphs or line by line with timestamps. Search inside it, copy it, or download subtitles in one click.
Readable paragraphs
Sentences are grouped into paragraphs you can paste straight into notes or a blog post.
Subtitles ready to upload
SRT and VTT files with accurate timing for YouTube, Premiere, CapCut and more.
Find any moment
Search the transcript and jump to the timestamp you need.
Why people switch
Everything you need from a transcription tool
A free audio to text converter with no meeting bots and no per-minute surprises: upload a file, get an accurate transcript.
Fast
Long recordings are split and transcribed in parallel, so most files are ready in minutes.
Accurate
State-of-the-art AI speech recognition that handles accents, jargon and long recordings.
90+ languages
Auto-detects the language, or pick it yourself for best results with accents and dialects.
Long files
Upload recordings up to 10 hours — full lectures, podcasts and all-day workshops.
Audio and video
MP3, M4A, WAV, MP4, MOV, WebM and more. Audio is extracted in your browser before upload.
Private by default
Audio is deleted as soon as the transcript is ready. Delete transcripts any time.
Do I need to convert my Opus file first?
No. Drop the Opus file in as it is — it's converted to compact speech audio in your browser before upload.
How accurate is the transcription?
We use state-of-the-art AI speech recognition. Clear recordings typically come out near-verbatim; heavy background noise, people talking over each other and very strong accents reduce accuracy.
What happens to my files?
Audio is converted in your browser, uploaded only to transcribe it, and deleted as soon as the transcript is ready. You can delete transcripts at any time.
How long can a file be?
Free files can be up to 30 minutes. Paid plans support files up to 10 hours each.
What's the difference between pay-as-you-go and Unlimited?
Pay-as-you-go credits are a one-time purchase that never expires — good for occasional long files. Unlimited is a subscription with no daily file limit, subject to fair use of 100 hours per 30 days.
Can I cancel anytime?
Yes. Manage or cancel your subscription from your account page; you keep access until the end of the paid period.
Related tools
Your next transcript is a drag-and-drop away
Start free with 3 files a day. Upgrade only when you need more.