3D Printed QR Door Hanger
An elongated plaque with one big hole for the door handle, made to hang on the other side of the door.
1Content
The shorter the link, the better the code prints. For calls, email, SMS or WhatsApp, use their own tab.
Always use the guest network: anyone who scans the code can read the password.
When scanned, the phone offers to save the contact straight to the address book.
When scanned, it opens the mail app with these fields already filled in.
When scanned, it opens the messaging app with the number and text already written.
When scanned, it opens WhatsApp with your number and message already written, ready to send.
Or start from a template
2Code design
On the 3D object the logo becomes a single-color silhouette.
3Turn your QR into a 3D object
Up to 28 characters. A short text multiplies scans.
Code preview
Everything is generated in your browser. No data is sent to a server.
3D object
- Modules
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- Per module
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- Size
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- Triangles
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How it's different from the wall plaque
The wall plaque is screwed or glued in place permanently; the door hanger is built for the opposite, for moving around. One big hole, for the door handle, replaces the two screws, and a proportion taller than it is wide makes it look like a hotel's 'Do Not Disturb' sign.
It's the natural format for content that changes from one room to the next, or from one guest to the next: house rules, WiFi, a check-out time.
Ways to use it
- Rentals and Airbnb: house rules, WiFi, house guide, check-out time.
- Hotels: room service, hotel information, do-not-disturb / please-clean with two hangers, one per side.
- Offices and clinics: opening hours or a link to book an appointment.
Hole size
The hole is generated at 13 mm across, enough for most round door knobs and many lever handles without rubbing. If your door has a very thick handle, scale up the whole piece so the margin around the hole grows proportionally.
Common questions
Does it fit any door knob or handle?
The hole is 13 mm, sized for standard round knobs. With very thick lever handles, try a larger piece overall first.
Can each side show different content?
Not in this model: the QR code and text are on one face. For a two-sided hanger (say 'Do Not Disturb' / 'Please Clean') print two separate pieces.
What's the usual size?
85 mm wide covers most uses. For longer text or a bigger QR code, go up to 120 mm.
Can I make one per room?
Yes, with batch generation: if the link or the text contains {n}, each hanger comes out with a different number or code inside a single ZIP.
Which material holds up best to daily handling?
PETG. It gets hung and unhung from the knob many times a day in a hotel, and holds up to wear better than PLA.