Demolens - Annotate, Zoom & Record on Screen

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

Live demos shouldn't break your flow. Demolens is a presenter-grade overlay for Chrome that lets you annotate, zoom, spotlight, record, and reuse demo copy on any webpage — without ever leaving the page or opening a separate tool. Built for SaaS sales reps, customer success managers, founders, teachers, and webinar hosts who walk people through software live, every day. Hold one trigger key. Draw with a press. Switch tools with a single shortcut. Trigger a saved promo overlay or fill a demo form with a snippet without breaking eye contact with your audience. Press one shortcut to record the active webpage tab — no separate screen recorder needed. Everything stays on your machine. 🎬 BUILT FOR LIVE DEMOS, NOT JUST SCREENSHOTS Most annotation tools are designed for marking up a screenshot after the fact. Demolens is designed for the moment you're presenting — on a sales call, in a webinar, screen-sharing with a customer, or recording a product walkthrough. The whole interface assumes you have one hand on the keyboard and a live audience watching. ✨ KEY FEATURES ✏️ Annotate any webpage live Pencil, rectangle, circle, oval, arrow, tick, cross, text, underline, highlight, eraser. All live, all on top of the real page, all keyboard-driven. 🎯 Spotlight, focus blur & laser pointer Dim the rest of the page and emphasize one chart, one button, one paragraph. Keep your audience's eyes exactly where you want them. 🔎 Smooth zoom mode Zoom into a specific UI element without losing your place. Exit and the page returns to normal — no broken styles, no scroll jump. 🎥 One-shortcut tab recording Press Alt+Shift+R to start and stop. Records only the active webpage tab and your overlays — never the Chrome toolbar, never another window. Saves a local WebM file when you're done. 🎙️ Optional voice narration Off by default. Enable it only when you want it, grant Chrome microphone permission once, and your narration is bundled into the local recording. No mic is ever captured silently. 🏷️ Watermark snapshots and recordings Add a text watermark or upload a PNG logo. Choose any corner, scale to taste. Branded clips without a video editor. ⚡ Reusable form-fill snippets Stop typing the same demo email, demo company, or pricing example on every call. Save snippets once, assign a shortcut, fill any input field instantly during the demo. 📢 Promotional overlay snippets Show a launch offer, talking point, or call-out as a polished centered overlay during webinars and product reveals. Custom duration or stay-until-dismissed. 🗂️ Side-panel snippet manager Search, filter, edit, import, export, and merge snippets from a Chrome side panel. Move your demo script between machines or share a snippet pack with teammates. ⌨️ Presenter-first shortcuts Hold the trigger key, press a tool letter, draw, release. Built for muscle memory, not menu hunting. 🪶 Non-destructive overlays Demolens draws above the page, never edits it. Zoom and focus modes restore the original page styles cleanly when you exit. 🔒 100% LOCAL-FIRST PRIVACY Demolens does not require an account. Does not upload your screen, your snippets, or your recordings to any server. Does not sell or share your data. Settings can sync only through your existing signed-in Chrome profile, and only if you choose to. No third-party servers, no telemetry, no analytics on your demo content. Recordings are saved as local WebM files via the Chrome download dialog — they live on your machine, full stop. 🎯 PERFECT FOR ▶ SaaS sales reps running discovery and product demos ▶ Customer success managers walking customers through features ▶ Founders running founder-led demo calls ▶ Teachers and trainers screen-sharing during lessons ▶ Webinar hosts and live content creators ▶ Solutions engineers and pre-sales teams ▶ Anyone who explains software live, on screen-share 🚀 HOW IT WORKS 1️⃣ Pin Demolens. Hold your trigger key on any webpage and the floating toolbar appears. 2️⃣ Draw, highlight, spotlight, focus, or zoom — switch tools with one keystroke. 3️⃣ Press Alt+Shift+R to record the active tab. Press again to save a local WebM. 4️⃣ Open the side panel to manage snippets, assign shortcuts, and trigger form-fill or promo overlays mid-demo. 💬 WHY DEMOLENS IS NOT ANOTHER WEB PAINT TOOL Drawing on a webpage is the easy part — many tools do that. Demolens is different because it is designed around the rhythm of an actual live demo: ▶ Trigger key + tool letter = one-handed control while screen-sharing ▶ Spotlight, focus, and zoom keep audiences on the part of the UI that matters ▶ Snippets remove the typing tax of repeating the same demo data on every call ▶ Recording starts in one shortcut — no second app, no toolbar capture, no surprise upload ▶ Local-first means your demo content and recordings stay on your machine Stop fumbling with a screenshot editor mid-demo. Stop retyping demo data on every call. Stop opening a separate recorder. Press the shortcut. Demo. Done. 📥 GET STARTED Click "Add to Chrome", pin Demolens, hold your trigger key on any webpage, and start drawing. Open the side panel to add your first snippet. Press Alt+Shift+R to record your first demo. Have feedback or feature requests? We read every one.