GoogleQR – a lightweight QR code generator for PrestaShop

Key advantages

• Offline and independent: QR code generation on the server side, without calls to external APIs.
• CSP compliance: the QR image is served from your domain, so it is not blocked by Content Security Policy.
• Lightweight and fast: no heavy dependencies – the module package weighs ~80 KB.
• Quality and readability: PNG generated by PHP GD, automatic scaling to specified dimensions.
• High compatibility: integration with the hook displayProductButtons in PrestaShop 1.7/8/9.
• Flexibility: size, margin, and error correction level parameters (L/M/Q/H).
• Fallback without GD: if PHP GD is unavailable, the module returns a readable SVG.

How it works

The module injects a tag  tag into the product buttons. The image source is the module's endpoint, which generates the QR code on the server and returns it as a PNG image (or SVG when GD is not available).

Features

• Automatically retrieves the URL of the current product and encodes it in QR.
• Parameters: size (e.g., 128x128), ecc (L/M/Q/H), margin (px).
• Serving from the same domain – no CSP warnings and mixed content.
• No Composer/vendor dependencies – very small package size.
• Possibility of simple expansion with BO configuration (e.g., default size or ECC).

Technical requirements

• PHP 7.2+ (higher recommended, depending on your PrestaShop version).
• PHP GD (optional, for PNG). Without GD, the module will return SVG.

Business benefits

• Easy sharing of product cards offline and in retail (screen scan).
• Faster transition of mobile customers to a specific product page.
• No costs or risks associated with external services.

FAQ

Does QR work without the internet? Yes – generation is local. Only scanning and navigating to the page requires a network on the user's side.

What if the server does not have GD? The module will automatically return the QR code in SVG format, which is readable by scanners.

Can I change the size? Yes – the parameter size in the image address or by configuring the module (if you enable it).