Make clean, one-page first-aid reference posters you can print or save as a PDF — for the break room, classroom, garage or trailhead. Pick one of five core scenarios (CPR, choking / Heimlich, severe bleeding, burns, or anaphylaxis) and an audience (workplace, home, kids, or outdoors). The poster updates live with numbered steps, a "do not" list, when-to-call-for-help cues, and audience-specific notes — workplace posters add fill-in lines for your nearest kit and AED, and the Kids setting swaps in the correct child and infant techniques. Choose Letter or A4, set your local emergency number, and pick an accent colour. Content follows standard Red Cross / AHA-style first-aid guidance and carries a clear disclaimer: it is a quick reference, not a substitute for certified training or professional medical care. Runs entirely in your browser; nothing you type is uploaded.
On Mac, Windows, Linux or any computer: just click "Open First Aid Posters" above — it runs right in your browser, no install needed. To keep it like a desktop app, click the install icon (⊕) at the right of Chrome or Edge's address bar, or use Safari's File → "Add to Dock" on a Mac.
On iPhone or iPad: open it in Safari, tap the Share button, then "Add to Home Screen." It behaves like a native app — full-screen, offline-capable, launches from your home screen.