Opus to text

Transcribe Opus for voice messages, calls, and app audio

Opus is the audio behind most voice messages and calls. SnailText transcribes an Opus file locally with no upload, and it works the moment you install, no extra download.

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Transcribe Opus and every other format, locally

No account · Nothing uploaded

What is an Opus file?

Opus is a modern, open audio format built for speech and streaming. It is what most messaging apps use for voice notes, and what a lot of calls and web audio are encoded in. It compresses voice extremely well, which is why it is everywhere and why plenty of desktop tools still do not open it.

How to convert Opus to text

SnailText turns a Opus into text locally, in four steps:

Open the Transcribe files screen in SnailText.
Drop in your Opus file, or a whole folder of them.
Pick your output: plain text, Markdown, JSON, or SRT / VTT subtitles.
Run it. The transcript is saved next to your files or wherever you choose.

The Whisper speech model transcribes on your own machine, so the audio never leaves your computer and there is no per-minute charge. Opus works the moment you install SnailText, with no extra codec download. Transcription runs fully on your machine.

You exported or received an Opus voice message, a recorded call, or app audio, and you want it as text. SnailText transcribes the Opus on your machine, so you do not have to hunt for a converter that accepts it or upload your audio anywhere.

Free Opus to text converter, no upload

Most "opus to text online" tools upload your file to a server and cap you at a few minutes unless you pay. SnailText is the opposite: it transcribes Opus on your device, so nothing is uploaded, there is no length limit beyond your own memory, and the free tier has no per-minute meter. That makes it a fit for anything sensitive, recordings with names, client audio, or private notes, where sending the file to a web service is the thing you want to avoid.

Opus to text: transcript, subtitles, and more

Opus transcription is not just plain text. Pick your output before the run and SnailText writes any of these:

· Plain text (TXT) for a clean transcript you can read, search, and edit.
· SRT and VTT subtitles with phrase-level timestamps, ready to drop onto a video.
· Markdown with a heading per file, handy for notes and docs.
· JSON for feeding the transcript into your own scripts or tools.

Try it on your own files

Download for Mac

Transcribe Opus and every other format, locally

What people transcribe from Opus

Voice message

"Transcribe an Opus voice note from a messaging app into readable text."

Recorded call

"Turn an Opus recording of a call into a searchable transcript."

Batch of notes

"Drop a folder of Opus voice messages in and get text for each."

Opus to text FAQ

How do I transcribe an Opus file?

Add the Opus file to SnailText's Transcribe files screen and it transcribes locally with the Whisper model. Opus works immediately with no extra codec download, and nothing is uploaded. Many web tools do not accept Opus, so a local tool is often the easiest path.

Where do Opus files come from?

Mostly voice messages: many messaging apps encode voice notes as Opus, often inside an OGG container. Calls and web audio use it too. SnailText reads both standalone Opus and OGG-wrapped Opus natively and transcribes them locally.

Is Opus transcription free?

SnailText's free tier transcribes locally with the compact Whisper models, no account and no per-minute meter. Pro adds the larger, more accurate models and an optional on-device AI cleanup pass, $7.49/mo or $89/yr for up to 3 devices.

Can I transcribe a whole folder at once?

Yes. Drop a folder (or several files) into the Transcribe files screen and SnailText processes them one after another, writing a transcript for each. It scans the files directly in the folder. You can also drag and drop files straight in.

Can I get SRT or VTT subtitles?

Yes. Pick SRT or VTT as the output before you run the transcription and SnailText writes a subtitle file with phrase-level timestamps. Choose it up front, since subtitles are produced during the run. You can also export plain text, Markdown, or JSON.

What languages can it transcribe?

SnailText transcribes in the full set of Whisper languages (99), and can auto-detect the language or let you pick. Everything runs locally, so multilingual transcription works with no internet after the model is downloaded.

Transcribe other formats

Transcribe Opus on your own machine

Free local transcription, no account needed. Opus to text, plus SRT and VTT subtitles, on Mac and Windows.

Download for Mac Or for Windows →