Replace CAPTCHAs with WebAuthn passkeys for bot prevention
I built Nocaptcha after getting frustrated with traditional CAPTCHAs both as a user and developer. WebAuthn passkeys offered a promising alternative that's both more secure and user-friendly. What makes Nocaptcha different: - Uses WebAuthn standard instead of puzzle-solving - No need for users to remember passwords or solve puzzles - Open source Current limitation: Working with W3C WebAuthn Community Group on true passkey disposal for this use case. Looking for feedback particularly on: 1. Integration experience 2. User experience compared to traditional CAPTCHAs
Replace CAPTCHAs with WebAuthn passkeys for bot prevention launched on December 8, 2024 with 71 votes, #436 of 5,365 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Nocaptcha is an open-source bot prevention tool that replaces traditional CAPTCHAs with WebAuthn passkeys. Instead of solving puzzles, users authenticate using the WebAuthn standard, eliminating the need to remember passwords. Developers can integrate it as an alternative to conventional CAPTCHA systems. The project is still refining passkey disposal mechanisms and welcomes feedback on integration and user experience compared to existing solutions.
written from the facts on this page · September 2026
From the sources
Single-use passkey verification to replace CAPTCHA - standardapplied/nocaptcha
Replace CAPTCHA with single-use, disposable passkeys. Human-friendly bot prevention without the frustration. The API is build in Java using Helidon 4.x. Powered by Java virtual threads. The UI is pure Javascript using Vite build tool. mvn package cd api java -jar target/api.jar Debugging For adding a debugger java -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:5005,suspend=n,server=y -jar target/api.jar Coding & naming conventions We use the check style plugin and have adopted Google's check style rules Configure your IDE accordingly. To ensure that you have followed the conventions, run: mvn validate Contributing Contributions are welcome! Feel free to help enhance either the: Just…from github.com
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