無料WhatsApp QRコードジェネレーター

A WhatsApp QR code encodes a URL in the format https://wa.me/[phone number]. The phone number must include the country code without the plus sign or leading zeros. For a US number, that looks like wa.me/14155551234. For a UK number, wa.me/447700900123. Getting the format wrong is the most common reason WhatsApp QR codes fail.

The wa.me link opens WhatsApp on the scanner's device and starts a new conversation with your number. If WhatsApp is not installed, it opens a web page prompting the user to download the app.

You can add a pre-filled message by appending ?text= followed by URL-encoded text. For example, wa.me/14155551234?text=Hi%20I%20saw%20your%20QR%20code will open a chat with the message 'Hi I saw your QR code' already typed in the message field. The user still has to tap Send, so they remain in control of the conversation.

WhatsApp Business accounts get features that matter for QR code campaigns. A business profile shows your company name, address, website, and hours, so people who scan your code see context before they type. You can set up automated greeting messages that reply instantly when someone starts a chat, which is important because QR scanners expect immediate feedback. Quick replies let you respond to common questions with saved templates. Away messages handle scans that come in outside business hours.

The WhatsApp Business API (for medium and large companies) goes further with chatbot integrations, CRM connections, and message templates that support images, documents, and interactive buttons. If you are running QR codes on product packaging or in-store displays and expect more than a few dozen conversations per day, the API is worth setting up. It also provides analytics on message delivery and read rates, so you can measure how well your QR code placements perform.

The pre-filled message is your most powerful tool for routing and context. Instead of a generic 'Hi', use messages that tell you where the scan came from and what the person needs. A restaurant table tent might use 'Hi, I am at Table 12 and would like to place an order.' A product package could use 'Hi, I bought [Product Name] and have a question.' A conference badge might use 'Hi, we met at [Event Name] and I would like to connect.' This approach gives your team immediate context when the message arrives, cutting response time significantly.

For customer support, include a ticket category in the pre-filled text: 'Support request: billing issue' or 'Support request: delivery status'. This lets you route messages to the right team member or trigger the right chatbot flow.

Keep pre-filled messages under 100 characters. Longer messages feel intrusive and users are more likely to delete them before sending. The goal is to reduce friction, not to put words in someone's mouth.

When someone scans your WhatsApp QR code, you receive their phone number automatically. In the EU, this counts as collecting personal data under GDPR, and you need a lawful basis for processing it. The most practical basis is legitimate interest for responding to their inquiry, but you should not add these numbers to marketing lists without explicit consent.

Include a privacy notice near your QR code (a small line like 'By messaging us, you agree to our privacy policy at [URL]'). WhatsApp's own policies prohibit bulk messaging to contacts who have not opted in. If you send promotional messages to people who only scanned your QR code for a one-time question, WhatsApp may restrict your account.

For GDPR compliance, also consider data retention. Set a policy for how long you keep chat histories with customers, and make sure your team knows not to share customer phone numbers outside WhatsApp without permission. If you use the Business API with a CRM integration, ensure the CRM also complies with data protection requirements.