Do guests need an app to use a QR check-in?

No — done right, neither side installs anything. The guest's pass lives on their invitation page (or as a saved image), and whoever works the door scans it with their phone's browser camera.

When is wedding check-in worth doing?

Large guest lists (120+), venues with security requirements, events with gate-crashing concerns, or when you genuinely want live arrival counts (e.g., timing the entrance). For a 60-person wedding where you know every face, skip it.

What happens if a guest forgets their QR pass?

The door list is the fallback: whoever's scanning searches the guest's name and taps check-in manually. The QR is a speed-up, not a gate.

QR Code Check-In at Weddings: How It Works and When It's Worth It

QR check-in migrated from conferences to weddings once invitations went digital — if each guest already has a personal invitation link, a personal arrival pass is nearly free. Whether you want one is a different question.

How it works (the no-app version)

A guest confirms their RSVP.
Their invitation page now shows an arrival pass — a QR code per confirmed guest, viewable on the phone or downloadable to print.
At the entrance, a host, planner, or usher opens a scanner page in their phone browser (camera permission, no app install) and scans passes.
Each scan marks that person arrived; a live count updates for whoever's watching the dashboard.

The important details: per guest, not per household (parties arrive split more often than you'd think), and a manual fallback — a searchable door list for anyone who forgot the pass, since the QR is a convenience, not a bouncer.

When it's genuinely useful

Big weddings (120+ guests): the door person can't know every face, and a greeting line moves faster with scans than with list-hunting.
Venue security requirements: some venues (hotels, estates) want a controlled entrance; a scan beats a printed list.
Live arrival awareness: knowing "84 of 110 arrived" is surprisingly useful for timing the ceremony start or the couple's entrance.
Multiple entrances or shifts: scans from several phones land in one live count.

When to skip it

You know every guest personally and the venue is open.
Under ~80 guests with a single entrance — a warm greeter beats a scanner.
No one on your team wants to hold a phone at the door. (An unstaffed check-in is worse than none.)

It should be opt-in per event — the same invitation system should work with check-in fully invisible when you don't need it.

Running the door well

Brief whoever scans: greet first, scan second. The scan takes a second; the greeting is the job.
Have the door list open as the fallback and for guests arriving without phones (they exist, and they're lovely).
If the venue's signal is weak, use a scanner that queues scans offline and syncs later — arrival counts a few minutes late beat a line at the door.
Pair passes with seating: a pass that shows "Table 5" answers the question every guest asks the moment they're inside.

Related guides

Wedding seating chart guide — the plan behind the check-in
How to collect wedding RSVPs online — the data the door runs on
Digital wedding invitation etiquette — doing it tastefully