Google Slides Dynamic Timer

About

Keep every presentation on schedule and stress free:
Evenly split your time across selected Google Slides, with per-slide tweaks and smart auto-redistribution as you present. Choose the section of slides you want to present and enter your total time. The extension divides the time given evenly, giving a countdown timer for each slide. 

Dynamic Time redistribution:
Sometimes things don't go as planned no matter how hard you practice. Our extension mitigates that so taking too long on a slide even with the timer is not an issue. The extension dynamically rebalances time as you go. Going overtime on a slide borrows extra time from the remaining slides and shortens their timer's. This lets you know to pick up the pace and focus on presenting without having to calculate how much time you have left. Finishing a slide early also redistributes the unused time to other slides, giving you more time to present other topics. 

Fine-tune key slides by adding, removing, or setting an exact time for specific slides when some need more (or less) attention.

UI: 
Minimal, draggable overlay with clear countdown and subtle color cues that let you know if your time on that slide is close to running out from a glance.

Pause / resume / stop controls right on the overlay.

Range & time checks: Prevents saving if your chosen slides exceeds the deck’s slide count to accurately divide time. Prevents incorrect inputs when tweaking the time of specified slides.


Per-slide demonstrations:
3: +5 → add 5 minutes to slide 3
7: -2 → subtract 2 minutes from slide 7
5: =1 → set slide 5 to exactly 1 minute

The remaining time is re-split fairly across the other slides.



How to use:
Open a Google Slides deck.

Click the extension and pick your slide range and total minutes. (Optional) Add per-slide rules with +, -, or = minutes.

Save, then enter Present mode. Then click start on the overlay.

Advance as normal. The timer updates and redistributes time automatically.




Privacy & permissions:
No analytics, no ads, no tracking. All timing runs in your browser; settings are stored locally.

Optional Google authorization (Slides read-only) is used only to fetch the slide count for validation. Content is not uploaded or stored on external servers.