Guides

Everything we learned making QR codes that work on paper, on screens and in 3D-printed plastic — written down so you do not have to learn it by trial and error.

Updated: October 2026 · How we write our guides

• 3D-printed QR codes: sizes and materials

  The three numbers that make a printed QR scannable, plus slicer settings.

• QR menus for restaurants

  Static vs dynamic codes, the best link to use and where to place it.

• Why some QR codes fail to scan

  The six real causes of scan failures with a 30-second fix for each.

• WiFi QR codes for guests and rentals

  Guest networks, tricky passwords, printing and where to mount the sign.

• QR error correction: how much to use

  Levels L, M, Q and H, center logos and the cost in printed size.

• Durable materials for printed QR plates

  PLA, PETG, ASA and resin compared for rain, sun and daily washing.

• The link behind the QR code

  Static or dynamic, short URLs, UTM tags and links that must never be printed.

Our guides are also available in Spanish: leer las guías en español.

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