Offline and private dictation: where your voice goes

Some dictation turns speech into text on your own device. Some sends the audio to a server and gets the text back. Both feel the same while you are talking, so the only ways to know are the maker's documentation and a simple test: switch off the connection and try a sentence.

What each system does

Dictation	Where speech is processed, according to its maker
iPhone	On the iPhone in many languages; no connection required
Mac	On the Mac or on Apple's servers, depending on the language; shown in Keyboard settings
Windows voice typing	Online, with Azure Speech services
Windows voice access	On the PC, after a one-time language download
Pixel advanced voice typing	On the device, except the "Fix it" feature and detailed edits
Google Docs voice typing	Through the browser's speech service; needs a connection
Word Dictate	Sent to Microsoft; Microsoft says audio and text are not stored

Each statement comes from the maker's help page, linked in the sources below.

The ten-second test

Turn on Airplane Mode, or switch Wi-Fi off on a computer.
Open a note and start dictating.
Say a full sentence.

If text appears, the speech was recognized on the device. If you get an error or nothing happens, that dictation needs a server.

The test answers the offline question with certainty. It answers the privacy question only in part: a system that works offline may still use a server when a connection is available. For that, read what the maker says.

Why it matters

For a grocery list, it does not. It starts to matter when what you say is not yours to share:

Client and patient information. Lawyers, doctors, therapists and accountants dictate details that are covered by confidentiality duties.
Work under a non-disclosure agreement. Product plans, source code comments, financial figures.
Other people's words. Reading out a message or a document that someone sent you in confidence.
Places without a connection. A plane, a basement archive, a hospital ward with no reception. Online dictation simply does not work there.

On-device dictation removes the question, because there is no upload to think about.

What to check before trusting a dictation app

App Store and web listings use words like "private" and "secure" freely. These five questions get you a real answer:

Where is speech turned into text? On the device or on the developer's servers?
Does it work in Airplane Mode? Run the test above.
Is there an account? An account ties what you dictate to an identity.
Is the text rewritten by AI, and where? Clean-up and rewriting are often done by a separate model, which may run somewhere else than the speech recognition.
What does the privacy policy say about audio and transcripts? Look for retention periods and whether recordings are used to train models.

A server-based app is not a bad app. Large models on servers can be very accurate, and for everyday writing the trade is reasonable. The point is to choose it knowingly.

Offline options by device

iPhone and iPad: built-in Dictation in many languages, or a voice keyboard that transcribes on the device. See iPhone.
Mac: built-in Dictation for the languages processed on the Mac, or a dictation app that runs a speech model locally. See Mac.
Windows: voice access. See Windows.
Android: advanced voice typing on Pixel 6 and later. See Android.
Google Docs and Word: their own buttons need a connection, but system dictation types into them as well. See Google Docs and Word.

Frequently asked questions

Does dictation send my voice to the cloud?

It depends on the system. Windows voice typing, Google Docs and Word send speech to a server. iPhone Dictation is processed on the phone in many languages, Mac Dictation depends on the language, and Pixel's advanced voice typing keeps speech on the device.

How do I know if my dictation works offline?

Turn on Airplane Mode and dictate a sentence into a note. If the text appears, recognition runs on the device.

Is offline dictation less accurate?

Not necessarily. Speech models that run on phones and laptops have improved a great deal. Server models are larger, which can help with heavy accents, noise and automatic rewriting. Try both on your own voice before deciding.

Is built-in dictation safe for confidential work?

Check the maker's statement for your language and device, run the Airplane Mode test, and follow your profession's rules. This page describes how the systems work and is not legal advice.

Sources

Last checked November 9, 2026