How to use WhatsApp QR codes

A QR code is a wa.me link wearing print clothes. It removes the one step that kills conversions on paper: nobody types a URL from a poster. Here is how to use them so they actually scan.

When a QR code beats a link

The rule is simple: on screens, use a link; on physical surfaces and anything viewed from a distance, use a QR code. Posters, table tents, packaging, receipts, business cards, shop windows, event badges, vehicle decals. Also on-screen in one case: slides presented to a room, where the audience scans from their seats.

Size and placement rules

• 2 cm minimum printed width for close-range scanning (a flyer in hand).
• Scale with distance. Rough rule: printed width should be at least a tenth of the scanning distance. A poster scanned from two meters needs a code around 20 cm wide.
• Flat surfaces. Curved bottles and creased packaging break scans. Put the code on the flattest face available.
• Quiet zone. Leave white space around the code. Cramming it against text or borders is a common cause of failed scans.

Why codes fail to scan

Almost always one of four things: printed too small, too little contrast, decorative recoloring, or a blurry upscale from a small PNG. The fix for the last one is exporting SVG, which our generator provides alongside a 512 pixel PNG. Both are dark-on-white deliberately; that combination scans on everything back to years-old phone cameras.

Add the message, and the fallback

Two details separate professional QR usage from an afterthought. First, encode a pre-filled message that gives the chat context: “Hi, I am at table” beats a blank chat box. Second, print the short link under the code (wa.me/91987...) for the person whose camera will not cooperate. The code is the fast path, not the only path.

Test with a real phone

Before printing five hundred of anything, scan the final artwork, at final size, from a realistic distance, with an ordinary phone. Every number typo and every too-small print run in history would have been caught by this one habit. More business-specific patterns, including menus and order flows, are in the business use cases guide.