How do I test my QR code before printing?

Before you print your QR code on packaging, signage, flyers or other materials, it's important to make sure it scans correctly on real devices. A quick test now can save you time, money, and customer confusion later.

1. Scan it from your screen

Start by opening the QR code in your ConnectQR dashboard or downloading a preview version. Then:

• Scan it with your smartphone’s camera app
• Try both iOS and Android devices if possible
• Test with multiple lighting conditions (e.g. bright light, dim light)

✅ If the code loads the expected content — great! Move to physical testing.

2. Print a test version at the size you'll use

Print your QR code at the actual size it will appear on your final material.

• Minimum recommended size is 2 x 2 cm (0.8 x 0.8 in)
• Use a printer with good resolution (preferably 300 DPI or higher)
• Don’t distort or stretch the image — always keep the QR code square

Then scan the printed version using a phone camera.

3. Test the material you’re printing on

If you're printing on something other than regular paper (like cardboard, stickers, or plastic), test on the actual material:

• Watch for glare or reflection if using glossy finishes
• Ensure ink or surface texture doesn’t blur the code
• Avoid creases or cuts near the QR area

4. Check contrast and color visibility

Make sure your QR code has enough contrast to be scannable. The pattern should be darker than the background.

⚠️ Low-contrast color combinations (like yellow on white) may look great on screen but won’t scan in real life.

→ See our guide on contrast and color best practices

5. Print at different sizes if needed

If your QR code is going on a large poster or tiny label, print several test sizes and scan each one. It helps to find the sweet spot for clarity and distance.

6. Use ConnectQR’s live preview and test tools

When designing your code, use the live preview in the customization screen to spot any readability issues early. Stick to proven design options and scan test often as you go.

Still unsure?

If you’d like a second set of eyes, feel free to send our support team a screenshot or PDF of your design. We’re happy to help confirm scannability before you print!