Napukin
Simple Wireframing from anywhere.
No Subscriptions
No monthly fees, no accounts, no cloud. Just open your browser and start wireframing.
Mobile First
Designed to work on your phone, tablet, or desktop. Sketch ideas wherever inspiration strikes.
Works Offline
Install as a PWA and use it without an internet connection. Your work stays on your device.
Open File Format
Documents use the open-source .npkd format — a simple ZIP archive with JSON and assets.
Export to Figma
Take your wireframes further by exporting to Figma's native .fig format.
Full Canvas Editor
Pan, zoom, shapes, text, pen tool, images, layers, undo/redo, and more — all in the browser.
Install the App
Napukin is a Progressive Web App — install it directly from your browser for a native app experience. No app store required.
Desktop
In Chrome or Edge, click the install icon in the address bar, or go to Menu → Install Napukin.
iPhone & iPad
Open in Safari, tap the Share button, then tap Add to Home Screen.
Android
In Chrome, tap Menu (⋮) → Add to Home Screen or accept the install banner.
Quick Links
- What is Napukin? — Learn what this tool is and who it's for
- FAQ — Common questions and answers
- Getting Started — Start wireframing in minutes
- openNapkin File Format — Learn about the .npkd file format
- Roadmap — See what's coming next