captcha-generate

一个模仿 Google reCAPTCHA 的 Vue 3 验证码组件，外观和交互与真实的 reCAPTCHA 几乎一致，但验证逻辑完全可控

Python server-side implementation of the Cap.js proof-of-work CAPTCHA protocol

Star Captcha demo, developed using Python Flask and HTML. Easily deployable to multiple platforms.

Lightweight, pure-Go CAPTCHA generator — numeric, alphabetical, mixed, custom, word, math, and audio captchas with verifiable keys, tunable anti-bot noise, and themeable colors.

Movement-based captcha prototype: track characters moving on paths to distinguish humans from AI. Pure client-side demo.

CaptchaLa for PHP. A privacy-first, user friendly Captcha SDK for PHP.

PHP Captcha Creator & Validator class that generate Captcha to block automatic form bots, and compares it with the value received from the user.

CaptchaLa for Wordpress. A privacy-first, user friendly Captcha plugin for Wordpress.

Modern CAPTCHA-like challenges for users

The Secure CAPTCHA Plugin is an enterprise-grade, open-source CAPTCHA solution designed to provide robust protection against automated bots while maintaining exceptional user experience. Built from scratch with security as the prime factor, this plugin aims to be non-crackable while delivering lightning-fast performance

A modern, object-oriented CAPTCHA library

an interactive multi-stage CAPTCHA web application

an open-source JavaScript library for easy, fast, and reliable CAPTCHA integration

Self-hosted, open-source captcha — no third-party vendors. Two drop-in variants: server-side PNG images (FastAPI + MongoDB) and a browser-only canvas component. MIT license.

🌈🎯 A robust full-stack Monorepo (Node.js/React/Postgres) featuring high-fidelity Glassmorphism, dynamic localization (pt-BR/en), JWT auth dashboard, and 100% local double-layer bot prevention (Honeypot + Math CAPTCHA). Orchestrated via Docker with Nginx reverse proxy on Port 80.

Official WordPress plugin for captchaapi.eu — a GDPR-compliant, EU-hosted Proof-of-Work CAPTCHA. Privacy-first reCAPTCHA alternative with no cookies, no tracking, and no US data transfer.