Getting Started with Headless Cookie Consent

Cookie consent banners are everywhere — but most of them are doing more harm than good. They block rendering, tank Core Web Vitals, and load hundreds of kilobytes of JavaScript before your users even see your content.

There's a better way: headless cookie consent.

What is Headless Cookie Consent?

Traditional cookie consent tools ship a pre-built UI widget that injects itself into your page. You get limited control over styling, placement, and behavior — and your performance pays the price.

Headless cookie consent separates the consent logic from the presentation layer. You get a lightweight API that handles:

• Cookie scanning and classification
• Consent state management
• Compliance record-keeping
• Regulatory mapping (GDPR opt-in, CCPA/CPRA opt-out, DMA reinforced consent)

The UI? That's entirely yours to build with your own framework, your own design system, and your own performance budget.

Why Performance Matters for Consent

Google's Core Web Vitals are a ranking factor. Every third-party script you load competes for the main thread. Traditional consent managers often add 200–500ms to Largest Contentful Paint (LCP) because they:

1. Load a blocking JavaScript bundle
2. Fetch configuration from a remote server
3. Render a DOM-heavy overlay
4. Wait for user interaction before releasing other scripts

With a headless approach, the consent API call happens asynchronously while your page renders normally. There's no render-blocking overlay, no layout shift from an injected banner.

How Katla Does It

Katla provides a REST API and lightweight JavaScript SDK that gives you full control:

import { KatlaConsent } from "@katla/widget";
 
const consent = new KatlaConsent({ siteId: "your-site-id" });
 
// Check current consent state
const state = await consent.getState();
 
// Present your own UI, then record the decision
await consent.grant(["functional", "analytics"]);

Your banner, your rules. Katla handles the compliance layer — automated cookie scanning, consent receipts, and a dashboard for your legal team.

Getting Started

1. Sign up at katla.app and create your first site
2. Run a scan — Katla automatically discovers and classifies every cookie
3. Install the SDK — a single script tag or npm package
4. Build your UI — use your own components, or start with our examples
5. Go live — consent records are stored and available for audits

What About Existing Cookies?

Katla's AI-powered scanner identifies cookies from known third-party services and classifies them automatically. Unknown cookies are flagged for manual review, so you're never guessing about compliance.

The Bottom Line

If you care about performance and compliance, headless cookie consent isn't optional — it's the modern standard. Decouple your consent logic from your UI, keep your bundle lean, and let your legal team sleep at night.

Ready to try it? Get started for free.