Decka for Google Slides
Any deck you already have. Suddenly answering back.
Add the Chrome extension, open a presentation, and drop a live poll, quiz, or Q&A onto the slide you're on. Your audience scans once and stays with you for the whole session.
A Google Slides deck is open in Chrome with a Decka activity running on the slide itself: Guess the Doodler. On a participant's phone beside the browser a doodle of your home office draws itself, lands anonymously on the slide, and the room's guesses fill the vote bars until the reveal names who drew it.
Getting started
Install, pin, and connect your first deck.
Four short steps, one of which is Google asking your permission — which is the point.
- 1
Add it from the Chrome Web Store
One click to install. Pin the icon to your toolbar so it's there whenever you open a presentation.
On the Chrome Web Store listing for Decka for Google Slides, the Add to Chrome button is clicked, Chrome asks to confirm, and Add extension installs it. The cursor then opens Chrome's extensions menu and pins Decka, and the Decka icon appears in the browser toolbar.
- 2
Sign in
The panel opens a tab to finish signing in, then brings your presentation back to the front with your workspace loaded.
In Google Slides, the Decka side panel shows its signed-out view. Sign In opens the Decka sign-in page in a new browser tab, an email and password are typed, and Sign in is clicked. The extension then closes that tab and brings the Google Slides tab back to the front, with the panel already signed in and asking for permission to edit the presentation.
- 3
Allow this presentation
Google asks your consent for the one Drive permission Decka uses, then confirms the single file in its own picker. Per-file access means nothing else in your Drive is ever visible to us.
The Decka panel asks for permission to edit an untitled Google Slides presentation, and suggests naming it first. The deck is renamed in Slides, that suggestion retires, and Allow this presentation is clicked. Google asks for consent to the one Drive permission Decka uses, then opens its file picker with this presentation already selected. The selection is confirmed and the permission card disappears — the deck is connected.
- 4
Add an activity to the slide
Pick a poll, quiz, or Q&A from the panel and it appears on the slide you're on, running live while you present.
In Google Slides, the Decka side panel lists saved activities. A poll is picked, the extension writes a Decka placeholder into the slide and then covers it with the live activity, and the panel shows the slide bound and saved. Votes arrive on the slide as the audience answers.
Move to the next activity. The room moves with you.
Everyone scanned once. When you advance, every phone in the room switches itself over — nobody touches their handset, nobody rescans, and the code on screen changing leaves them connected.
A live Decka quiz runs on a presenting screen beside two audience phones. One phone scans the six-character code shown on screen and joins with just a name; both phones answer the question. The presenter's own phone, running the Control remote, starts the reveal, and the presenter's mouse shows the final results and then simply advances the slide. A word cloud starts and the join code on screen changes to a new one, while both phones move themselves to the new activity untouched: no rescan, no new link.
While you present
One scan, and the room follows you from activity to activity.
The part that usually breaks in live sessions is the handoff between activities. This is the part Decka is built around.
They scan once
A QR code and a six-character code sit on the slide. Participants enter a name and nothing else — no account, no install, no email address.
You move on; their phones move with them
Advance to the next activity and every connected phone switches itself over — nobody touches their handset. No rescanning, no new link, and the code on screen changing doesn't disconnect anyone already in.
Drive it from your phone
Open Control on your phone to start the quiz, reveal an answer, moderate a word cloud, or approve questions — while the slide itself stays clean.
Per-file access, and no interest in your slide text
Decka asks Google for access one presentation at a time. When you click "Allow this presentation", Google's own picker confirms that single file. The grant is cumulative — it covers the decks you have handed to Decka this way, and grows by one each time you connect another — but it never extends to the rest of your Drive, and never to a deck you have not picked. Unbinding an activity removes its placeholder from the slide, and switching accounts in the panel clears the credentials stored on your machine — but neither withdraws the grant itself. Removing Decka's access in your Google Account settings is what does that.
We never read the substance of your slides — not body text, not speaker notes, not your images. The extension does list the objects on a slide, by id and description only, so it can find the placeholders it put there itself. What it writes to a slide you bind an activity to is a small Decka-owned layer — a card, our logo, and a background image when the activity uses one — so that collaborators, exports, and printed copies still show that something lives there — and it's removed when you unbind. The live activity itself renders as an overlay in your Chrome rather than inside the file, which is why a collaborator without the extension sees the placeholder card instead. Presenting from PowerPoint as well? The PowerPoint add-in shares the same account, activities, and plan.
FAQ
Google Slides questions, answered
How do I install it?
Add the Decka for Google Slides extension from the Chrome Web Store, then pin it so its icon stays in your toolbar. Open any presentation and click the icon to bring up the Decka panel.
Why does it ask for permission on each presentation?
Decka uses Google's per-file access, so it can only touch the presentations you explicitly hand it. The first time you use a deck, the panel asks you to allow that one file, and Google's picker confirms it. Nothing else in your Drive is visible to us.
It asks me to name the presentation first — why?
Google's file picker can struggle to resolve a brand-new deck still called "Untitled presentation", so the panel suggests naming it first. It's advice rather than a hard requirement — you can continue either way.
Does my audience need the extension, or an account?
No. Only the presenter installs it. Your audience scans a QR code or types a short code, enters a name, and they're in — no extension, no download, no account.
What does Decka do with my slides?
We never read the substance of your slides — not body text, not speaker notes, not your images. We do list a slide's objects by id and description so we can find the placeholders Decka added itself. When you bind an activity to a slide, Decka adds a small layer of its own elements — a card, our logo, and a background image when the activity uses one — so the activity is visible to collaborators and in exports, and it removes them when you unbind. We also store the presentation's Google file ID and title so activities can be matched back to the right deck.
What do people see if they don't have the extension?
The live activity renders as an overlay in the presenter's Chrome, so it isn't baked into the file itself. A collaborator opening the deck without the extension sees the Decka placeholder card on that slide instead of the running activity.
How does the AI build a quiz?
You type a topic, or paste in the text you want questions from, and Decka writes the questions and marks the correct answers.
Which activities can I run?
Polls, quizzes, Q&A, word clouds, live reactions, A/B tests, Guess the Doodler, and Meeting Dodgeball. Presentation Bingo is the exception — it binds words to specific slides, so it's built in the Decka editor rather than the extension.
Will it work with my company's Google Workspace?
It installs like any Chrome extension, and most workspaces allow that by default. Some Workspace policies restrict extensions or third-party file access — if yours does, your IT team can allowlist Decka.
Is there a free plan?
Yes. Free covers every activity type with Decka branding, subject to a participant limit per activity. Pro removes the branding, raises the participant limits, and unlocks the Open and Pre-submission Q&A modes.
Put a live poll on the deck you're already presenting.
Create a free account, add the extension, and let the room answer.
Create a presentation