Build a CAPTCHA Generator & Validator in JavaScript (Anti-Bot System)
Build a real-world CAPTCHA Generator & Validator using Vanilla JavaScript.
Learn how websites block bots, spam, and automated abuse on the frontend.
👉 Full source code on GitHub | Week 7 of 52 JavaScript Projects
🚀 What You’ll Build
In this project, you’ll build a CAPTCHA Generator & Validation system using HTML, CSS, and Vanilla JavaScript.
This is not just random text generation.
You’ll learn how to:
Generate dynamic CAPTCHA challenges
Randomize characters securely
Validate user input accurately
Reset & regenerate CAPTCHA
Build anti-bot protection logic
Create a user-friendly security UI
This project is portfolio-ready and demonstrates frontend security fundamentals used in real applications.
⏱️ Chapters (Outcome-Based)
00:00 – Why CAPTCHA Matters (Bots vs Humans)
00:30 – Live CAPTCHA Demo
02:00 – Project Setup
03:13 – CAPTCHA UI Design
10:48 – JavaScript Setup
13:00 – Generate CAPTCHA Logic
18:20 – CAPTCHA Validation Logic
22:01 – Reset & Error Handling
23:23 – Manual Testing & Edge Cases
📚 Recommended Playlists
🔥 52 JavaScript Projects (Beginner → Advanced) • JavaScript Projects For Beginners To Advance.
🎨 Animations with HTML, CSS & JS • Animating Access with HTML, CSS, & JS
🌐 JavaScript API Projects • JavaScript API Projects
💼 Responsive Portfolio Website • Responsive Personal Portfolio Website
📂 Check out the source code for this project on GitHub!
👉 [https://github.com/codehuntersharath/...]
If you find this project helpful in your JavaScript learning, make sure to ⭐ star the repository to show your support!
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