4th April 2025
Tool
Passkey Demo | tools.simonwillison.net
— Experiment with passkey registration and authentication using the WebAuthn API in your browser. This demo allows you to create passkey credentials, authenticate with them, and inspect the underlying protocol responses and data. Stored credentials are maintained locally in your browser's storage, making this a fully client-side implementation for learning how modern passwordless authentication works.
Recent articles
- The Axios supply chain attack used individually targeted social engineering - 3rd April 2026
- Highlights from my conversation about agentic engineering on Lenny's Podcast - 2nd April 2026
- Mr. Chatterbox is a (weak) Victorian-era ethically trained model you can run on your own computer - 30th March 2026