Beyond image creation, the D3400 also features SnapBridge, which utilizes Bluetooth connectivity, for wireless sharing of images to your mobile device, including automatic sharing of 2MP images between the camera and your mobile device. The lightweight camera body incorporates a 3.0" 921k-dot LCD screen for live view monitoring and image review and, catering to first-time DSLR owners, the D3400 also features a helpful Guide Mode to aid in achieving specific photographic looks or techniques, such as how to produce shallow depth of field imagery in a helpful, step-by-step manner. Ten different Special Effects are also available in-camera to creatively refine the look of both stills and movies.

The 24.2 megapixel DX-format CMOS sensor and EXPEED 4 processor work together to produce overall high image quality with notable detail, dynamic range, color accuracy, and low-light sensitivity to a native ISO 25600. Additionally, the sensor's design omits an optical low-pass filter in order to acquire the greatest sharpness and detail from subjects. The EXPEED 4 processor also enables a wealth of speed throughout the camera system, including support for Full HD 1080p movie recording and a full-resolution continuous shooting rate of 5 fps.