How to use it
- Choose Link, WiFi or Text and enter the content.
- Set the code size, module height and quiet zone.
- Adjust the base plate, margin and corners.
- Download STL or 3MF and print with a color change.
What you can encode
- Link: a website, menu, review page, social profile or portfolio. If you leave out https://, it is added for you.
- WiFi: network name, password and security type (WPA/WPA2/WPA3, WEP or none). Guests scan the code and join without typing the password; it is a popular sign for rentals, cafés and guest rooms.
- Text: any short message, such as a contact note or instructions.
The code is generated in your browser, so your WiFi password is never sent anywhere.
Size, modules and error correction
A QR code is a grid of square modules. More content means more modules, and at a fixed size, smaller ones. The page shows the module count and the size of one module as you type.
| Setting | What it does | Suggestion |
|---|---|---|
| Code size | Outer size including the quiet zone | 50 mm (about 2 in) or more |
| Module height | How far the dark modules rise above the plate | 1 mm |
| Quiet zone | Blank border around the code, in modules | 2 modules |
| Error correction | L 7%, M 15%, Q 25%, H 30% of damage the code can survive | M |
With a 0.4 mm nozzle, aim for modules of at least about 1.2 mm; the tool warns you when they get smaller. Short links and a lower error correction level keep modules large.
Printing a readable QR code
A scanner needs strong contrast: a light base and dark modules, or the reverse.
- Single extruder: print the base in white, then add a filament change (M600 or Add pause/color change in your slicer) at the top of the base plate, the height shown in the note below the download buttons, and continue in black.
- Multi-material printer: download the base plate and the raised part as separate STL files and assign a color to each.
Use 0.2 mm layers and make the plate thickness a multiple of the layer height. After printing, test the code with your phone from a normal distance before you hang it up.
Ideas
- WiFi sign for the guest room, a short-term rental or an office lobby.
- Table tent or coaster linking to a menu.
- Business card holder or booth sign linking to your website.
- Plant labels or equipment tags that link to care instructions or manuals.
- Gift tags with a link to a playlist or video message.
The base plate can be square or rounded, and you can add a keyring hole for small tags.
Tips
- Use a link you control or a stable URL; a printed code can't be edited later.
- Avoid very long URLs with tracking parameters; they make the code denser.
- Matte filament scans more reliably than glossy or silk, which can reflect light.
- Keep the quiet zone. Codes with no margin are harder to scan, especially on a busy background.
If you only need a printable paper or image QR code, the regular QR code generator is quicker.
Frequently asked questions
Can you 3D print a QR code that scans?
Yes, as long as there is good contrast between the modules and the base and the modules are large enough for your nozzle, about 1.2 mm or more with a 0.4 mm nozzle.
How do I make a WiFi QR code to 3D print?
Choose WiFi, enter the network name, password and security type, then download the STL. Guests can join by scanning it.
How do I print a QR code in two colors with one extruder?
Add a filament change in your slicer at the layer where the dark modules start, the top of the base plate.
What size should a 3D printed QR code be?
For a phone to scan it from about arm's length, 40–60 mm works well for short links. Longer content needs a bigger code.
Is my WiFi password stored?
No. The QR code and the 3D model are generated in your browser.
Last updated: November 12, 2026