Genome editing (GE) has become a potent method for precisely enhancing tomato features, allowing genetic factors to be modified with specificity to increase nutritional quality, disease resistance, and yield. Recent research has revealed the effective use of clustered regularly interspaced short palindromic repeat (CRISPR/Cas9) technology to modify certain genes linked to fruit quality and stress responses, resulting in improved fruit qualities including larger fruit and better flavor profiles. Furthermore, studies show that genome editing can help produce tomato types that are more resistant to infections, which will lessen the need for chemical pesticides. But there are still issues that might prevent these technologies from being widely used, such as public acceptance of genetically modified organisms (GMOs) and regulatory barriers. Even though genome editing has a lot of potential to improve tomato farming, more study and discussion are needed to resolve these issues and realize the full range of advantages. With the ability to make precise genetic changes that improve desired features, CRISPR technology is essential to the modification of tomato properties. Studies show that CRISPR may be used to enhance tomato characteristics including disease resistance, fruit quality, and stress tolerance. Promising outcomes have been observed in the use of genetic modification in tomato breeding. For instance, gamma-aminobutyric acid (GABA) concentration, domestication qualities, and jointless-2 phenotype have all been effectively edited by researchers, leading to tomatoes with higher nutritional value, improved domestication traits, and changed fruit characteristics. Moreover, quantitative trait variation in tomatoes has been engineered through the use of genome editing tools. Researchers have created a variety of cis-regulatory alleles using promoter editing, which offers useful quantitative diversity for breeding. This technique enables the rapid evaluation of a large number of promoter variations for genes controlling crucial tomato production factors such as fruit size, inflorescence branching, and plant architecture. The chapter describes how to change certain genes in the tomato genome using precise techniques such as the CRISPR/Cas9 system and its derivatives. With the use of these instruments, researchers can improve the effectiveness, accuracy, and success of breeding programs, which have the potential to completely transform crop breeding.