A dynamic spot weld analyzer which provides a simple and precise method of accurately determining the quality of a spot weld is described. The analyzer monitors the voltage across a pair of welding electrodes during the welding of workpieces. In operation, a voltage is impressed across the electrodes and the dynamic resistance values are compared to acceptable upper and lower values. When the dynamic resistance falls outside the upper and lower threshold limits, the weld quality is not acceptable and an audible and/or a visual signal to that effect is provided.