Headless WooCommerce means using WooCommerce for products, orders, payment, and inventory, but building the frontend separately in React, Next.js, or Vue. The store becomes faster, more flexible, and more secure.
Why headless?
WooCommerce's frontend (PHP-rendered product pages) isn't known for being fast. A React frontend with static pages or server-side rendering can be ten times faster. Plus, you get the freedom to design exactly the interface you want without WooCommerce template constraints.
WooCommerce Store API
Since WooCommerce Blocks, Store API has become the official way to build headless checkout. It handles cart, checkout, payment, and customer account without going through the traditional PHP checkout page.
Next.js Commerce
Vercel's reference implementation. Fast, clean, but requires customization. Good starting point. Product pages are rendered statically with ISR (Incremental Static Regeneration), the cart is client-side.
Challenges
Payment integrations: Stripe works well headless. Klarna Checkout requires their widget to be rendered, which can be tricky in a SPA. SEO: Next.js with SSR solves it, but pure client-side React requires extra work.
Plugin compatibility: many WooCommerce plugins assume PHP rendering. Product Add-Ons, dynamic pricing, some shipping calculators. They either need API support or need to be rebuilt.
When it pays off
High traffic, unique UX requirements, dev team that can maintain the frontend. If you have 200 products and one person running the store: not worth the complexity. If you have 10,000 products, high traffic, and a dev team: it's a gamechanger.