How to Build a Cookie Consent Banner in WordPress Without a Plugin (Complete Guide)

Most tutorials either point you to a plugin or show you half the code. This is the complete version — HTML, CSS, JS, and WordPress setup — built from a real production theme, with every GDPR mistake already fixed. No plugin. No third-party consent service. Total control over the UI. What You'll Build A fixed banner that appears in the bottom-left corner on first visit. The user can: Accept all cookies Reject all cookies Open a settings panel and toggle three categories individually: Analytical — Google Analytics (GA4) Marketing — Meta Pixel, Google Ads Functional — Live chat, embedded maps Each category loads its scripts independently. Nothing fires until the user gives explicit consent for that category. What You Need A custom WordPress theme (child theme works too) jQuery (loaded by WordPress by default) js-cookie v2 — one small JS file, no npm needed Advanced Custom Fields (optional — only for an editable consent message in wp-admin) Step 1 — Add js-cookie to Your Theme Download js.