A WhatsApp QR encodes a wa.me link with your phone number, optionally with a pre-filled message. Anyone who scans it opens WhatsApp on the chat screen with you, ready to send.
Use the URL field below and paste: https://wa.me/15555550100 (replace with your full international number, no plus sign, no spaces). To pre-fill a message, append ?text= followed by URL-encoded text, e.g. https://wa.me/15555550100?text=Hello.
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What to encode
The wa.me format is the WhatsApp-official deep link. The number must be in full international format without the plus sign or any separators: https://wa.me/15555550100 for a US number, https://wa.me/447700900000 for a UK number.
Optional message pre-fill: append ?text=Your%20message — spaces become %20, line breaks become %0A. WhatsApp will open the chat with that text staged in the input ready for the user to send.
Avoid wa.link short-URLs created by WhatsApp Business app for QR purposes — they redirect through Meta's servers and behave like dynamic links. wa.me is direct and never breaks.
Where it earns its place
Restaurant table cards (book a table via WhatsApp), real-estate signs (text an agent), business cards (chat instead of email), event flyers (RSVP via WhatsApp), retail packaging (customer service contact).
Markets with high WhatsApp adoption — most of Latin America, India, much of Europe and the Middle East — see meaningfully higher response rates when contact is via WhatsApp QR vs phone or email.
Privacy of the encoded number
The phone number is encoded in plain text in the QR dot pattern. Anyone who scans the printed code can read it. Treat the QR card as moderately sensitive — fine for storefront use, less appropriate for, say, a public lamp-post poster.
If you want a QR that can be revoked (e.g. for short-term campaigns), use a redirect on your own domain (yoursite.com/chat → wa.me/...) so you can change the target later. The QR itself stays static.
Frequently asked questions
- Do scanners need WhatsApp installed?
- Yes. The wa.me link opens the WhatsApp app if installed; otherwise it falls back to the WhatsApp web page asking to install. On phones without WhatsApp, the scan effectively becomes an install prompt.
- Can I change the number after printing the QR?
- Not directly — the number is encoded in the dot pattern. Workaround: encode a URL on your own domain that redirects to wa.me/... Then changing the number is a redirect update, not a reprint.
- Will it work in countries where WhatsApp is blocked?
- No. The wa.me URL needs to resolve to WhatsApp's servers; if the country blocks them, the scan fails. Mainland China, parts of the Middle East, and a few other regions block WhatsApp at the ISP level.