Opus to text: how to transcribe .opus files on iPhone

You have a WhatsApp voice note — WhatsApp, Telegram and Discord voice messages are Opus files — and you need the words in it as text. You don’t need a converter, an mp3 tool, or a desktop app: transcription apps accept .opus directly.

Short answer: Import the file into AI Transcribe — tap Import, choose Audio File, pick your .opus file — and the transcript appears with timestamps and speaker labels. Files up to 3 hours are supported, and the format is converted internally, so no preparation is needed.

What is a .opus file?

Opus is the codec behind almost every messaging app’s voice notes: WhatsApp (.opus), Telegram and Discord. It’s optimized for speech, which makes it ideal transcription material despite the small file size.

Opus to text, step by step

1. Get the file onto your iPhone (Files, Downloads, or shared from another app).
2. Open AI Transcribe and tap Import → Audio File.
3. Select the .opus file. It’s converted and transcribed automatically — keep the app open while it processes.
4. Use Summarize or any of the 15+ AI tools on the result, or export the transcript as text or PDF.

Frequently asked questions

Do I need to convert .opus to another format first? No. Conversion happens inside the app; any common audio format works.

How long can the file be? Up to 3 hours per file. Transcription takes minutes, not the file’s duration.

Which languages are supported? 32 languages with automatic language detection — the file’s language doesn’t need to be set manually.

What does it cost? AI Transcribe is free to download and try; the Pro subscription (weekly or annual) unlocks up to 3 hours of transcription per day.