Captcha Fill Check (Validate CAPTCHA) Using HTML, CSS & JavaScript | MayanCoders

Published: 05 March 2026
on channel: Mayancoders
39
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📌 Title

Captcha Fill Check (Validate CAPTCHA) Using HTML, CSS & JavaScript | MayanCoders

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📄 Description

In this tutorial we’ll build a Captcha fill check feature using HTML, CSS, and JavaScript. You’ll learn how to create a simple CAPTCHA (text or math-based), validate user input in real time, show success/error feedback, and prevent simple automated submissions. This is ideal for signup forms, contact forms, or any UI that needs a lightweight bot check without external services.

*What you’ll learn:*
• Create a CAPTCHA UI (text or simple math) with HTML
• Style the CAPTCHA and feedback messages using CSS
• Generate random CAPTCHA values in JavaScript
• Validate the user input on submit and in real time
• Show success and error states with animations
• Add basic retry and refresh CAPTCHA functionality
• Handle edge cases and improve UX (case sensitivity, trimming)

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📘 Video Summary

Step-by-step guide to implementing a client-side CAPTCHA and the validation logic to check user input. The video explains generating random challenges, comparing user responses, giving visual feedback, and adding a refresh/retry button. Includes tips for improving security and when to use server-side verification for stronger protection.

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⏱️ Timestamps

00:00 – Introduction & Demo
00:32 – Project Setup (files & structure)
00:42 – HTML Markup for CAPTCHA & Form
02:26 – CSS Styling & Feedback States
08:11 – JavaScript: Generating Random CAPTCHA
13:09 – Final Demo & Wrap-up

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🔖 Hashtags

#MayanCoders #Captcha #FormValidation #HTMLCSSJS #JavaScriptProject #WebDevTutorial #FrontendSecurity


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