How to Add Cookie Consent Banner in HTML CSS JavaScript – Free Generator

How to Add Cookie Consent Banner in HTML CSS JavaScript

In the modern web, privacy compliance is essential. This page provides a free generator to create a lightweight, responsive cookie consent banner for your website. Unlike heavy plugins, this solution uses vanilla HTML, CSS, and JavaScript.

This tool is designed for developers and site owners looking to add a cookie consent banner quickly. It integrates well with other essential site setups; for instance, once you have consent, you might want to learn how to add Google Analytics 4 to a website to track your traffic legally. If you are building utility pages, you might also find our Quick QR Code Generator useful.

Contents

1. Banner Generator
2. Get Code
3. How It Works
4. FAQ

Configuration

Live Preview

This is how the banner will look on your site.

Generated Code

Copy the code below and paste it immediately before the closing </body> tag of your HTML file.

How Cookie Consent Works

Under regulations such as GDPR (General Data Protection Regulation) in Europe and CCPA (California Consumer Privacy Act), website owners are generally required to inform users about data collection technologies like cookies.

1. The HTML Structure

The generated code creates a container div that sits on top of your website content (using a high Z-Index). It contains a paragraph for your disclosure message and buttons for user interaction.

2. LocalStorage Logic

To prevent the banner from appearing on every page load, the script uses the browser’s localStorage API.

On Load: The script checks if a key named cookieConsent exists.
If Missing: The banner is displayed.
On Click: When the user clicks “Accept”, the script saves true to localStorage and hides the banner.

Frequently Asked Questions

Q: Is this banner strictly GDPR compliant?

A: This banner serves as a “Notice”. For strict GDPR compliance, you must ensure that third-party scripts (like Analytics or Ads) are not loaded until the user actually clicks “Accept”. You would need to wrap your tracking scripts in a function that only executes upon the click event.

Q: Does this work on WordPress?

A: Yes. You can add the generated code to your theme’s footer.php file or use a plugin like “Insert Headers and Footers”.

Q: Will it slow down my website?

A: No. The code is extremely lightweight (less than 2KB) and uses standard browser features. It has negligible impact on LCP (Largest Contentful Paint).

Cite this content:
“Quick Utility Calculator | QuickCalculators” at https://quickcalculators.in/ from QuickCalculators, QuickCalculators.in – Online Calculators & Tools.
(Source: https://quickcalculators.in/add-cookie-consent-banner/)