Traditional CAPTCHA solutions often compromise user privacy by tracking visitors and requiring external dependencies. Altcha offers a revolutionary alternative - a privacy-first, self-hosted CAPTCHA that uses proof-of-work challenges instead of visual puzzles. In this comprehensive guide, we'll show you how to implement Altcha CAPTCHA on your HTML website. ## What is Altcha CAPTCHA? Altcha is a modern CAPTCHA alternative that prioritizes user privacy and provides a seamless experience. Unlike traditional solutions, Altcha: - **No cookies or tracking** - Fully GDPR compliant - **Self-hosted** - No external dependencies on Google or other services - **Invisible verification** - Users don't need to solve puzzles - **Proof-of-work based** - Uses computational challenges instead of visual recognition ## Prerequisites Before implementing Altcha, ensure you have: 1. **Paid plan** - Altcha is available on [Static Forms](https://www.staticforms.dev) paid plans (Pro or Advanced) 2. **API key** - Your Static Forms API key ## Step 1: Configure Altcha in Your Account First, set up Altcha in your Static Forms account: 1. Navigate to your [CAPTCHA settings](https://www.staticforms.dev/settings/captcha) 2. Switch to the "Altcha" tab 3. Generate your Altcha keys 4. Configure difficulty and expiration settings 5. Save your site key for frontend integration ## Step 2: Simple HTML Form Create a basic HTML form with Altcha: ```html Contact Form with Altcha

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``` **That's it!** Just add the script tag and the `` element. The widget handles everything automatically - no JavaScript needed! ## Step 3: Optional Styling Add some basic CSS to make it look better: ```css ``` ## Step 4: Common Options (Optional) You can customize the widget with these simple options: ```html

``` ### Simple Color Customization Change the widget colors to match your site: ```css altcha-widget { --altcha-color-border: #your-border-color; --altcha-color-border-focus: #your-focus-color; } ``` ## That's It! Your form now has Altcha CAPTCHA protection. The widget automatically: - ✅ Loads and verifies challenges - ✅ Handles all the complex cryptography - ✅ Sends the token with your form - ✅ Protects against spam and bots ## Quick Troubleshooting **Widget not showing?** - Make sure you included the script: `` - Replace `YOUR_API_KEY_HERE` with your actual API key **Form not working?** - Check you have a [paid plan](https://www.staticforms.dev/pricing) (Altcha requires Pro or Advanced) - Verify Altcha is enabled in your [account settings](https://www.staticforms.dev/settings/captcha) ## Complete Working Example Copy and paste this complete example: ```html Contact Form with Altcha

Contact Form

``` **Just replace `YOUR_API_KEY_HERE` with your actual API key and you're done!** ## Why Use Altcha? - ✅ **Privacy-first** - No tracking or cookies - ✅ **User-friendly** - No puzzles to solve - ✅ **GDPR compliant** - Built-in privacy protection - ✅ **Easy to implement** - Just 2 lines of code - ✅ **Works everywhere** - Modern browsers only ## Need Help? - [Get a paid plan (Pro or Advanced)](https://www.staticforms.dev/pricing) to use Altcha - [Configure Altcha](https://www.staticforms.dev/settings/captcha) in your account settings - [Read more form guides](/blog/getting-started-with-static-forms) ## Conclusion Altcha is the easiest way to add privacy-focused CAPTCHA to your forms. Just include the script, add the widget, and you're protected from spam while respecting your users' privacy. Ready to get started? [Upgrade to a paid plan](https://www.staticforms.dev/pricing) today!

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Implementing Altcha CAPTCHA in Next.js

Implementing Altcha CAPTCHA on HTML Websites