WhatsApp QR code generator

There is no magic in the square: a WhatsApp QR code is an ordinary QR code whose payload is a wa.me click-to-chat URL - https://wa.me/<number>?text=<encoded message>. The phone's camera decodes the URL, the OS opens WhatsApp, and WhatsApp starts a chat with your number, message pre-filled. That is why the code never expires and needs no account: as long as the number is on WhatsApp, the code works.

It is also why correctness lives in the URL, not the image. A wrong country code or an unencoded message produces a perfectly scannable code that opens a broken chat - the failure mode behind most "my QR does not work" complaints. The generator above builds the URL by the same rules as our link generator, then draws the code from it.

The rule of thumb printers use: minimum scan distance is about 10x the code's width. Work backwards from where the code will live:

The download here is 1200 x 1200 px, which prints crisply to roughly 10 x 10 cm at 300 DPI - poster size. Keep the quiet zone (the white border) intact; cropping it is the second most common self-inflicted scan failure after low contrast. Dark-on-light always; never invert.

Restaurants and cafes: table tents and menus with a pre-filled "I'd like to book a table" - pair it with a booking flow so the chat completes the reservation. Retail: on packaging and receipts for warranty and returns questions - the chat opens with the order context the customer would otherwise type. Trades and home services: vehicle wraps and door hangers; a scan while you are on a neighbour's job is the cheapest lead you will ever get. Events: badges and signage with a code word per stand, so the follow-up conversation carries where it started.

The common thread: paper and glass cannot host a button. Everywhere a screen can, use the plain link - one tap beats scan-then-tap.

1. Formatting the number like a human. Plus signs, spaces, dashes and brackets all invalidate a wa.me URL - it accepts international-format digits only. The form above strips them as you type.

2. Skipping the country code. A wa.me link without one opens a "phone number shared via URL is invalid" screen for every scanner outside your country - and for plenty inside it.

3. Pasting the message raw. An unencoded space or ampersand truncates the pre-filled text at best and breaks the link at worst. Encoding is handled here automatically; if you hand-edit the URL later, re-check it with the link generator before reprinting a thousand flyers.

A QR campaign that lands turns into a full inbox: the same five questions, at all hours, on one phone. That is the point at which the number behind the code should answer for itself. A WhatsApp chatbot greets the scanner, answers the repeat questions from a knowledge base, books the appointment, and hands genuinely new questions to you with the transcript attached.

Volume planning first? The API cost calculator estimates Meta's fees, WhatsApp limits covers the rate ceilings, and WhatsApp error codes is where to look when Meta says no. The free plan covers 600 conversations a month - most QR campaigns fit inside it for their entire first quarter.

Three things get called "a WhatsApp QR code" and they behave differently. Pick by what you are printing it for:

Practical rule: always encode the wa.me form. A shorter URL means fewer QR modules, and fewer modules is what keeps a 2 cm business-card code scannable. The link generator emits the same canonical form for screen use.

wa.me strips analytics, so a code word in the message is the zero-infrastructure way to know where a chat came from. When you need real numbers - scans per placement, per week, per campaign - put one hop you control in front of WhatsApp:

1. Create a short URL on your own domain per placement - yoursite.com/wa/menu, /wa/van, /wa/receipt.

2. 302-redirect each to the same wa.me link, and count the hits in your analytics before the redirect fires. Build the destination with the UTM builder if the redirect passes through a landing page first.

3. Keep the code word in the pre-filled message anyway - the redirect counts scans, the code word survives into the conversation, and together they tie a printed placement to a closed sale. That last step is where a WhatsApp chatbot earns its keep, logging every conversation source automatically instead of an agent asking "where did you see us?"

New to the ecosystem? Start with the WhatsApp Business API setup guide, see live chatbot examples, or go straight to the free plan - 600 conversations a month, no card.