How to dictate Slack messages on a Mac

Published 18 October 2026

Slack messages are short, frequent and conversational, which makes them a good fit for dictation. Slack itself doesn't turn speech into a typed message, but it has audio clips, and the Slack desktop app takes dictated text from macOS and from dictation apps. A couple of settings make it go more smoothly.

Before you start: the Enter key

When you dictate a longer message, you'll want line breaks. In Slack, Enter sends the message by default and Shift+Enter starts a new line. If you're used to pressing Return between dictated paragraphs, half your message goes out early.

You can change that. Click your avatar in the sidebar, choose Preferences, then the Advanced tab. Under "When writing a message, press Enter to", pick Start a new line. From then on Enter adds a line break, and you send with ⌘+Enter on a Mac. It's worth it if you often write in paragraphs. If your messages are mostly one-liners, leave the default.

Apple Dictation in Slack

Apple Dictation works in the Slack message box like in any app where you can type. Click into the message field of the channel or DM so the cursor is blinking there, then start Dictation with your shortcut or the Microphone key. Speak when the cursor pulses or the tone plays, and press Escape or the shortcut when you're done. Read the message before you send it. A misheard name in a channel is seen by everyone.

Apple Dictation stops after 30 seconds without speech. That's rarely a problem for chat, but it can cut off a long reply if you pause to think.

Audio clips instead of text

Sometimes a voice note says it better, for example when tone matters or the explanation is long. Slack calls these clips. In a channel or DM, click the microphone button in the message box to start recording, click the checkmark to finish, add a note if you like, and click the paper plane to send. Clips can be up to five minutes long, and Slack says they're available on every plan.

On desktop you can also add a transcript to an audio clip with the Generate transcript icon, so people who can't listen right now can still read it. Still, a typed message is quicker to skim and easier to search later. For questions, decisions and anything with numbers, text usually serves the team better.

Fixing a message after sending

If a dictated word slipped through, hover over the message, click the three-dot icon, choose Edit message and then Save Changes. Slack notes that owners and admins can limit who can edit messages, so on some workspaces this won't be available. Another reason to read before you press Enter.

Dictation apps and the Slack desktop app

A dictation app gives you one key for Slack, email and documents. It records while you hold the key, recognizes the speech and pastes the text at the cursor.

Slack's desktop app is built on Electron, and that matters for dictation apps. Electron apps hide their text fields from macOS accessibility until something asks for them. An app that doesn't ask can't find the message box or check that the text arrived, and you only notice when the box is empty. Our dictation troubleshooting guide covers this along with the usual settings.

Saypad handles it this way. It wakes accessibility up in Slack, pastes, then reads the message box back. If the text didn't land, it tells you. If a field can't be read at all, Saypad still sends the paste and shows "Paste sent". Every dictation is kept in its history with the audio, so nothing is lost.

For everyday use: hold fn, say the message, release, read it, send. For a long update, double-tap the key to dictate hands-free and tap again to stop. Add teammates' names, product names and channel jargon to Settings → Vocabulary, so they stop coming out as ordinary words. Saypad doesn't rewrite your message, so it still sounds like you and not like a press release. If you mostly write long posts, how to dictate long text on a Mac has tips on structure, and voice typing on a Mac compares the other options.

Questions

Does Slack have built-in dictation?

Slack has audio and video clips rather than dictation into the message box. On desktop you can add a transcript to a clip with the Generate transcript icon. To get typed text, use Apple Dictation or a dictation app.

Why did my dictated message send halfway through?

In Slack, Enter sends the message by default. If you press Return to break up a long dictated message, it goes out early. Set Enter to start a new line in Preferences → Advanced and send with ⌘+Enter instead.

How long can a Slack audio clip be?

Slack's help center says clips can be up to five minutes long, and they're available on every plan.

Can I fix a dictated Slack message after sending it?

Yes. Hover over the message, click the three-dot icon and choose Edit message. Workspace owners and admins can restrict editing, so it isn't always available.