Slide layouts
Title, content, comparison and section layouts with placeholders that keep slides consistent.
Free while in alpha · No sign-up
Build. Animate.
Present.
A full presentation app that runs in your browser. Themes, layouts, charts, transitions and animations, presenter view and PDF handouts, with the PowerPoint files you already use. Or download it for Mac and Windows.
Your decks never leave your computer. Nothing to install.
Your PowerPoint files
Open the decks you already have
SynDeck opens and saves PowerPoint files, so slides, layouts, tables, charts, transitions and speaker notes go back to PowerPoint users as they came. Finished decks export to PDF as slides, notes pages or handouts.
.pptx.potx.ppsx.syndeck→ PDF slides→ PDF notes→ PDF handouts
PPTXopens and saves, so files go back to PowerPoint users as they came
PDFslides, notes pages and handouts for printing and sharing
Mediaaudio and video in your slides: MP3, AAC, H.264, HEVC, VP9 and more
If you know PowerPoint, you know SynDeck
The ribbon, slide strip and shortcuts you expect
Home, Insert, Design, Transitions, Animations and Slide Show, laid out the way you already work.
Tables and charts
Styled tables and column, bar, line and pie charts, edited right on the slide.
Shapes and pictures
Shapes, text boxes, pictures and alignment guides for clean, precise slides.
Themes
Colour and font themes that restyle the whole deck in one click.
Slide master
Edit the master and its layouts once, and every slide follows.
Transitions
Fades, pushes, wipes and more between slides, with timing and sound.
Animations
Entrance, emphasis and exit effects, with builds by paragraph so points appear one at a time.
Audio and video
Embed sound and video in slides and play them during the show.
Presenter view
Your notes, the next slide and a timer in their own window while the slide shows full screen.
Pen and timings
Draw on slides while you present, and rehearse timings for a self-running show.
PDF export
Export slides, notes pages or handouts to PDF for printing and sharing.
Driven by AI agents
Every command runs from a command line, a control channel or an MCP server.
Take the tour
A real presentation app
Real SynDeck screens with its sample deck. Switch between them to see each part of the app.
Alpha
What SynDeck can't do yet
Building, presenting, PowerPoint files and PDF export work end to end. These are next.
Every PowerPoint file
Most decks open well, but SynDeck hasn't been tested on a large set of real-world files yet. Check important decks.
Old .ppt and .odp files
Only .pptx, .potx and .ppsx open for now: save older decks as .pptx first.
Video export
Decks export to PDF; turning a deck into a video is coming.
Privacy
Your decks never leave your computer
Board packs, pitches and client proposals stay on your own device. SynDeck opens, edits and presents everything locally, in the browser or in the app.
No uploads
The online version works on files inside your browser. Nothing is sent to us.
Works offline
Once it has loaded, SynDeck keeps working without an internet connection.
No account, no subscription
Nothing to sign up for, no licence server and no telemetry.
Standard files
PPTX and PDF out, so your work is never locked in.
Get SynDeck
Use it online, or download it
Version 0.6.0 alpha. Free, with no account. The online version is the quickest way to start.
Online
- Nothing to install
- Always the latest version
- Your files stay on your computer
Mac
- Runs offline
- Presenter view in its own window
First time opening it
- Open the DMG and drag SynDeck to Applications.
- Open SynDeck. macOS says it can't check the app; click Done.
- Go to System Settings › Privacy & Security, scroll down and click Open Anyway.
Windows
- Runs offline
- Portable: unzip and run
First time opening it
- Unzip the folder anywhere and open syndeck.exe.
- If Windows shows "Windows protected your PC", click More info.
- Click Run anyway.
FAQ
Questions, answered
Is SynDeck really free?
Yes. SynDeck is free while it's in alpha, with no account and no subscription.
Can it open my PowerPoint files?
Yes, .pptx, .potx and .ppsx files open and save, with layouts, tables, charts, transitions, animations and notes. It hasn't been tested on a large set of real-world decks yet, so check important ones. Older .ppt files need saving as .pptx first.
Can I present from it?
Yes. Start the slide show full screen, use presenter view with your notes, the next slide and a timer, draw with the pen and rehearse timings.
Are my files uploaded anywhere?
No. The online version opens files straight from your computer and works on them in the browser. Nothing is sent to Syntera Labs.
Which browser should I use?
Chrome or Edge on a recent computer give the best results. For presenter view in its own window, use the Mac or Windows app.
What does alpha mean?
SynDeck is new and improving every week. Save your work often and keep a copy of important decks.
Your next deck starts here
Open SynDeck in your browser. It's free, private and nothing to install.
Open SynDeck →