A lightweight, client-side CAPTCHA library designed to protect web forms from automated bot submissions without relying on any external APIs or dependencies. Built entirely in vanilla JavaScript and rendered via HTML5 Canvas, it provides secure, user-friendly visual verification challenges that seamlessly integrate into any HTML form.
zero-dependency captcha-library human-verification javascript-captcha bot-protection client-side-captcha html5-canvas-security form-validation-security privacy-focused-captcha lightweight-captcha pure-javascript-library xsukax-captcha visual-challenge canvas-text-distortion cryptographic-token anti-bot-protection front-end-security secure-form-submission open-source-captcha browser-based-captcha
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Updated
Dec 13, 2025 - JavaScript