The study aimed to analyze, synthesize, and investigate the measurement properties of clinical tests that assess foot posture in children and adolescents. The study included research published in scientific journals that analyzed the measurement properties of clinical tests, focusing on the validity, reliability, responsiveness, or specificity of tests for assessing foot posture in children and adolescents (ages 4 to 18 years). Studies involving children with lower limb surgery, neurological issues, or deformities, reviews, case studies, and abstracts were excluded. The search followed PRISMA guidelines on MEDLINE, EMBASE, PUBMED, CINAHL, SPORTDIscus. The methodological quality was assessed using the COSMIN and Brink and Louw tool, while the certainty of the evidence was evaluated using GRADE. Twelve studies were included in this systematic review, evaluating the following clinical tests: foot posture index-6, normalized truncated navicular height, Staheli index, plantar arch index, arch height index, navicular drop, resting and neutral calcaneal stance position, pediatric flat foot proforma, subjective perception of the height of the feet arch and Clarke angle. Current clinical tests predominantly prioritize the examination of intra- and inter-rater reliability. Conversely, validity has only been found in restricted studies, and responsiveness has not been assessed. No evidence supports high-quality measurement properties for clinical tests evaluating foot posture in children and adolescents.