Demolens - Annotate, Zoom & Record on Screen

Draw, annotate, highlight, zoom, record & overlay on any webpage with hotkeys - for live SaaS demos, sales, teaching & webinars.

Demolens turns Chrome into a live presentation layer for demos, walkthroughs, training, and screen sharing. Draw arrows, shapes, and freehand annotations on any webpage, spotlight the exact area you want people to notice, zoom into important details, and trigger pre-saved overlays or form-fill snippets with a single hotkey — all without leaving your tab or interrupting your flow. Built for people who present live, Demolens helps product managers, sales engineers, customer success teams, UX researchers, trainers, teachers, webinar hosts, and anyone running live walkthroughs explain things more clearly on Zoom, Google Meet, Microsoft Teams, Webex, or screen share. Why Demolens stands out Most annotation tools slow presenters down. You have to open a toolbar, switch panels, or click through controls before you can do anything useful. In a live demo, that breaks momentum. Demolens is hotkey-first. One keystroke lets you draw. Another highlights or zooms. Another drops a saved overlay or fills a form instantly. Your audience sees a smooth, guided presentation — not a presenter searching through menus. Core features - Draw on any webpage in real time with arrows, rectangles, circles, freehand ink, and text - Spotlight and focus mode to dim distractions and guide attention to the right area - Smooth zoom to highlight buttons, charts, tables, forms, and small UI details - Customizable keyboard shortcuts for faster, interruption-free presenting - Pre-saved overlays for promo messages, pricing callouts, CTAs, and feature highlights - Form-fill snippets to instantly enter demo emails, company names, and sample data - Laser pointer mode for clearer screen sharing during meetings, webinars, and presentations - One-key clear to instantly remove all annotations and continue your flow - Works across web apps, dashboards, internal tools, staging sites, Google Docs, Slides, and more Who it’s for Demolens is designed for: - Sales engineers and SaaS teams running live product demos - Product managers leading stakeholder walkthroughs and reviews - Customer success and onboarding teams delivering live training - UX researchers guiding participants through prototypes or flows - Teachers, trainers, and educators teaching over screen share - Webinar hosts and speakers who need a cleaner, more visible on-screen pointer Best use cases Use Demolens for live product demos, customer onboarding, sales walkthroughs, webinar presentations, teaching sessions, internal training, stakeholder reviews, design critiques, UX research sessions, and recorded screencasts where clarity matters. Privacy first Demolens runs in your browser and is built for fast, focused presenting. No recording is required. No unnecessary setup. Your annotations stay within your session unless you choose to save them. Get started fast Add Demolens to Chrome, pin it to your toolbar, press your hotkey, and start presenting with more clarity and control. Demolens helps you guide attention, explain faster, and deliver cleaner live demos — right inside Chrome.