A QR code on the poster that follows the event to the day
The poster gets printed three weeks ahead. In the meantime the schedule shifts, ticket sales open, the venue changes. A dynamic code absorbs all of that: the poster stays put, the destination evolves. This guide gives you a concrete plan for a concert, a conference, a wedding or an open house.
One code, several lives
Before sign-ups open, the code leads to a "coming soon" page. Then to ticket sales. The day before, to the program and directions. Afterward, to the photos or the feedback form. Each change takes thirty seconds, no reprinting needed.
- Web address editable at any time
- "Event" type: a scan adds the date to the phone's calendar (.ics file)
- "Location" type: opens directions in the maps app
- Link list: ticketing, program, accommodation, contact on a single page
- One code per medium (poster, flyer, social, invitation) to measure what works
Sizes by medium
On a street A3 poster, 10 cm per side at minimum, placed at eye level. On an A5 flyer, 4 cm. On an invitation, 2.5 cm with a line inviting people to scan.
| Medium | Reading distance | Minimum code size | Tip |
|---|---|---|---|
| Business card | 15 to 25 cm | 2 cm per side | Reserve a corner, keep a 3 mm white margin around it |
| Table tent, menu | 30 to 50 cm | 3 cm | One code per medium, never two side by side |
| A5 flyer, product label | 40 to 60 cm | 4 cm | Avoid busy photo backgrounds behind the code |
| A3 poster, shop window | 1 to 2 m | 10 cm | Place it at eye level, not at the bottom of the poster |
| Roll-up banner, tarp, vehicle | 3 to 5 m | 25 to 40 cm | Simple rule: distance ÷ 10 = code size |
On the day
A code at the entrance leading to the program, one on the tables leading to the menu or the guestbook, one at the exit leading to the feedback form. The stats then tell you, hour by hour, when people scanned.
Common mistakes
- Printing the ticketing address as a static code: if the provider changes, the poster is dead.
- Not saying what people will find behind the code: a "Scan for the menu" doubles the scan rate compared to a bare code.
- Placing the code over a busy photo background or a heavy gradient: contrast drops and the scan becomes hit or miss.
- Removing the white margin around the code to save space: this quiet zone is needed for the scanner to work at all.
- Placing the code at the bottom of the poster, 40 cm off the ground.
Frequently asked questions
Does the add-to-calendar code work everywhere?
Yes, it produces a standard .ics file recognized by iPhone, Android, Google Calendar and Outlook.
Can I reuse the code for next year's edition?
Yes, that's the point of a dynamic code: change the destination and next year's poster can keep the same code.
Are the scans anonymous?
Yes. We count the country, the device and the time, with no cookie and no IP address kept in plain form.