QR codes turn a printed page into a link: a flyer to a booking page, a menu to allergy information, an invoice to a payment page, a certificate to a verification page. Adding one to a PDF is simple. Making sure it scans, and that people trust it, takes a little more care.
Generate the QR code
Use a QR code generator to turn your link into an image. Choose:
- A static QR code if the link will never change. It encodes the URL directly and works forever.
- A dynamic QR code if you might change the destination later. These go through a redirect service, so check the provider is reliable and will not expire your code.
Download the code as PNG at a high resolution, or as SVG for perfectly sharp printing.
Place it in the PDF
You can add the QR code in two ways:
- In the original document: insert the image in your word processor or design file before exporting to PDF. This is the cleanest option.
- On top of an existing PDF: use a PDF editor to place the image on the page, like a stamp. See how to add a stamp to a PDF for a similar workflow.
Size it so phones can scan it
- Minimum about 2 cm (0.8 inch) square for close-range scanning, such as a menu or a business card.
- Larger for distance: a poster read from a few metres away needs a much bigger code.
- Keep a quiet zone: leave a white margin around the code, roughly four modules (the small squares) wide.
- High contrast: dark code on a light background. Avoid light colours and busy backgrounds behind it.
Test before printing
Scan the code from the PDF on screen, then from a printed test page, with at least two different phones. Check that it opens the right page and that the page works on mobile.
Add a short label
A line of text next to the code tells people what they will get: "Scan to book", "Scan for allergy information". Also print the short URL underneath for people who prefer to type it.
Avoid looking like a scam
QR codes are increasingly used in phishing, so people are right to be cautious. Build trust by:
- Linking to your own recognisable domain where possible.
- Not using a QR code to ask for passwords or payment details unexpectedly.
- Printing the destination URL next to the code.
See QR code phishing in PDFs for what attackers do, so you can avoid looking similar.
Common uses
- Gift certificates, linking to booking or verification. See how to make a printable gift certificate PDF.
- Checklists, linking to the latest digital version.
- Invoices, linking to a payment page.
- Event flyers, linking to tickets or a map.
Takeaway
Generate a static code for permanent links, export it as PNG or SVG, place it with a white margin at a scannable size, test it with real phones on paper, and add a clear label with the URL. A good QR code is quick to scan and obviously trustworthy.
