While QR codes are simple to create, there are common mistakes that can hinder their effectiveness. One major mistake is using a low-quality image that doesn't scan well. Always ensure your QR code is high resolution. Another mistake is not testing the QR code before distribution; always scan it with multiple devices to ensure it works. Additionally, avoid using complicated links that are hard to remember. Keep the URL short and simple to enhance user experience. Lastly, don’t forget to include a call-to-action near your QR code to encourage scanning. By avoiding these pitfalls, you can maximize the effectiveness of your QR codes.