With a foundation rooted in punk rock, The Jack Knives skillfully craft sincere, honest, and passionate songs that explore themes of love, life, death, and romance. Their music reflects a wide range of influences, evident in the vibrant and dynamic compositions. Notably, tracks like "New York City" pay homage to iconic artists such as The Beastie Boys, The Pogues, and Bob Dylan, while other songs proudly acknowledge the influence of bands like The Gaslight Anthem and Social Distortion. In a 2021 interview, Si Short humbly expressed, "We are just a rock 'n' roll band. We are grateful that people listen and enjoy what we put out. We strive to create catchy melodies and relatable lyrics that resonate with our audience."