QR Codes for Events: The Complete Guide

The 4 ways to use QR codes at events

A single event page QR code does three of these four jobs. Only the door needs a different code — one that is unique per guest.

Promotion — Posters, flyers, café notice boards, Instagram stories, WhatsApp forwards. The code carries people from wherever they discover your event straight to the page where they can act on it — no searching, no typed URLs.

Registration — Guests scan and sign up on the spot. On Event Flo, registration includes government ID verification, so a QR-driven signup still produces a guest list of verified, real people.

RSVP invitations — Print the code on invitations for private events. Guests scan to RSVP and you track confirmations live.

Door entry — Each confirmed guest gets a unique ticket QR code, scanned at the door with the free event check-in app.

Generate an event QR code free

No third-party generator, no watermark, no paid tier.

1. Create your event — Set up the event on Event Flo — name, date, venue, capacity, free or ticketed. Hosting is free with 0% platform fees, in India and the US.

2. Click "Download QR" — In the event editor, download your event's QR code as a high-resolution image. It encodes your public event page URL and stays valid for the life of the event — even if you edit the details later.

3. Publish it everywhere — Drop the same code on posters, flyers, invitations, slides, and group chats. Every scan lands on one event page with one registration flow and one live guest list.

What happens when a guest scans

1. Scan — The guest points their phone camera at the code — on a poster, a flyer, or a friend's screen. No app download; the event page opens in the browser.

2. See the event — Date, venue area, price, vibe, and how many verified guests are already going. Enough to decide on the spot, which is exactly when interest is highest.

3. Register or RSVP — The guest signs up and completes one-time government ID verification. For approval-based events, you review each request before confirming.

4. Get a ticket — Confirmed guests automatically receive their own unique ticket QR code by email and in-app — the code your door staff will scan on event day.

Poster and flyer best practices

Most failed scans are print problems, not code problems.

Follow the 10:1 rule: a code meant to be scanned from 1 metre should be ~10 cm wide; from 3 metres, ~30 cm. Handheld flyers can go as small as 2 x 2 cm.

High contrast only — dark code, light background. Never place the code over a photo or gradient.

Keep the quiet zone: a clear margin around the code, roughly four modules wide. Artwork touching the code's edge is the most common scan failure.

Caption the code: "Scan for details & tickets" outperforms a bare square. People need to know what they get for scanning.

Put it where phones already are: eye-level on notice boards, bottom-right on flyers, and on screens at the venue for the next event.

Test a printed proof with iPhone and Android at realistic distance and lighting before the print run.

On event day: QR codes at the door

Promotion and registration QR codes are shared; ticket QR codes are unique per guest and single-use. At the door, staff scan each ticket with the free event check-in app — sub-second validation, live headcount, no hardware.

Door staff work in an ordinary mobile browser, so there is nothing to install and no per-device licence: adding a scanning lane means handing another staff member a phone.

Frequently asked questions

How do QR codes work for events?

A QR code encodes your event page URL. Guests point their phone camera at it — on a poster, flyer, screen, or chat message — and open your event page instantly, where they can register, RSVP, or buy a ticket.

How do I get a QR code for my event?

Create your event on Event Flo and click Download QR in the event editor. You get a free, high-resolution code that links to your public event page — no separate QR generator or paid tool needed.

What are the main ways to use QR codes at events?

Four: promotion (posters, flyers, and WhatsApp forwards that link to your event page), registration (guests sign up by scanning), RSVP invitations, and door entry (each ticket carries a unique QR code that staff scan at the door).

Are event QR codes free?

On Event Flo, yes — generating an event QR code, collecting registrations, and scanning tickets at the door are all free. There are no platform fees, so hosts keep 100% of paid ticket revenue.

What size should a QR code be on a poster?

At least 2 x 2 cm on handheld flyers. For posters, follow the 10:1 rule — a code scanned from 1 metre away should be about 10 cm wide. Keep a white margin around the code and always test-scan a real print before mass-printing.