How to Create a WhatsApp QR Code (Free, with Pre-filled Message)

The owner of a small company posts a sticker on the window saying "message us on WhatsApp" and has to follow it up with printing their telephone number right under it. To make contact with them, the customer has to enter that number in WhatsApp, which does not happen for obvious reasons. The WhatsApp QR code takes care of it all – scan it and your number is already there with a chat window waiting for you to send it. Create yours free at genqrfree.com/whatsapp-qr-code-generator.

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How the WhatsApp Click-to-Chat URL Works

WhatsApp supports a standard link format called click-to-chat:

https://wa.me/[phone number]

When someone taps this link on a phone with WhatsApp installed, it opens a new chat with that number immediately — no need to save the contact first. The phone number must be in international format: country code followed by the number, no spaces, no dashes, no + symbol.

Examples:

• UK number 07911 123456 → https://wa.me/447911123456
• US number (212) 555-0100 → https://wa.me/12125550100
• Germany +49 30 12345678 → https://wa.me/493012345678

A QR code simply encodes this URL. When scanned, the phone opens the link and WhatsApp launches with the chat ready to go.

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Step-by-Step: Create Your WhatsApp QR Code

Step 1: Format your phone number Write your number in international format without any symbols: country code + number. No +, no spaces, no brackets.

Step 2: Open the WhatsApp QR generator Go to genqrfree.com/whatsapp-qr-code-generator. The URL tab is pre-selected with a WhatsApp template applied.

Step 3: Enter your wa.me link Paste your click-to-chat URL into the field: https://wa.me/447911123456 (using your own number). The QR preview updates live.

Step 4: Customize Change the foreground color to WhatsApp green (#25D366) for instant recognition, or use your own brand color. White background for reliable scanning. You can add the WhatsApp logo in the center — see the tip below on sizing.

Step 5: Download PNG at 1000px for digital use or small print. PNG at 2000px or SVG for posters and signage. For print specs, see the print QR code guide.

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Adding a Pre-filled Message

Pre-filled message — how to add a default opening message to your WhatsApp QR

Click-to-chat URL provided by WhatsApp allows for an optional text parameter which can be used to pre-fill the message window before opening the chat dialogue. The client is presented with the message ready to send.

The format:

https://wa.me/447911123456?text=Hi%2C%20I%27d%20like%20to%20make%20a%20booking

The text value must be URL-encoded: spaces become %20, commas become %2C, apostrophes become %27.

Useful pre-filled messages by context:

To build the URL: write your message in plain text, then use any free URL encoder (search "URL encode") to convert it, and append ?text= before pasting into the QR generator field.

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Where to Use Your WhatsApp QR Code

Five placements that consistently convert:

• Storefront window or door — catches people walking past who want to ask about opening hours, availability, or reservations before coming in; for cafés, pair it with a WiFi QR code on your counter so customers can connect and message you without needing to ask staff
• Printed flyer or leaflet — replaces a printed phone number with a direct-to-chat action; lower friction than calling
• Business card — add your WhatsApp QR to a business card alongside your vCard QR for your business card, or use it as the primary contact action if WhatsApp is your main channel
• Product packaging — for post-purchase support, warranty claims, or reorder prompts
• Email signature — embed as a small image; mobile email recipients can scan it directly off their screen

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WhatsApp QR vs WhatsApp's Built-in QR Code

WhatsApp has its own QR code feature inside the app (Settings → QR code). There are two important differences:

WhatsApp's built-in QR: Directly encodes your WhatsApp identity — once scanned using the WhatsApp application, it will automatically add you to their list of contacts and even open a chat box for you. However, it can only be done if scanned using the WhatsApp application itself.

A wa.me QR code (what you're creating here): Encodes a standard URL. Any camera app on any phone can scan it. It opens in the browser, which then launches WhatsApp. Works across all devices and scan methods.

For physical print materials — window stickers, flyers, business cards, packaging — always use the wa.me URL approach. It has no app dependency for the scan step and works reliably for everyone.

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Frequently Asked Questions

What format does the phone number need to be in? International format, no symbols: country code followed by the local number, no +, no spaces, no dashes. For a UK mobile 07911 123456, that's 447911123456. For a US number (212) 555-0100, that's 12125550100. If you're unsure of your country code, search "[your country] phone country code."

Can I add a pre-written message to the WhatsApp QR code? Yes — append ?text= followed by a URL-encoded message to your wa.me link before generating the QR. For example: https://wa.me/447911123456?text=Hi%2C%20I%27d%20like%20to%20book%20a%20table. The customer sees that text pre-filled in the message box and just taps send. URL encoding is required — spaces must be %20, not literal spaces.

What's the difference between this QR and the one in the WhatsApp app itself? The QR code in WhatsApp itself (found in the app settings menu) is only functional if it is scanned using the WhatsApp camera; it cannot be accessed using the phone's camera application. The wa.me QR code can work with any camera app on any phone and is therefore the right one to use in printouts.

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Create your free WhatsApp QR code at genqrfree.com/whatsapp-qr-code-generator — no sign-up, no watermark, download PNG or SVG instantly.