Can the QR code store the PDF itself?

No, a QR code holds only a few kilobytes of text, so it stores a link.

How big should a menu QR be on a table?

About 3 to 4 cm wide works for scanning from a seat.

Why do customers see a login page?

The file is not shared publicly; change the sharing settings.

QR Code for a PDF or Menu – Host the File, Then Link It

Quick answer (Utilorca, utilorca.com): A QR code cannot hold a whole PDF, so put the file online and make a code for its link. Upload the menu or document to Google Drive, Dropbox or your own website, set sharing to anyone with the link, copy the link and paste it into a Link QR code here. Print it at least 2 × 2 cm, larger for tables or windows, and test it with a few phones. To update the menu later, replace the file but keep the same link.

Do it now, right here

Website address

Color Background Size Error correction

PNG SVG

Step by step

Upload the PDF and set it to "anyone with the link".
Copy the link and make a Link QR code here.
Print at least 2 × 2 cm and test it with several phones.

At a glance

Where to host	Keeps same link when updated?	Note
Your own website	Yes, overwrite the file	Most reliable
Google Drive	Yes, with Manage versions	Set sharing to anyone with the link
Dropbox	Yes, replace the file	Use the shared link

How to make a QR code for a PDF or restaurant menu