Addressing the challenges of thin gingiva through minimally invasive augmentation techniques has gained significant attention in periodontal therapy. The present study was carried out to evaluate the effect of I-PRF on gingival thickness as a minimally invasive procedure to enhance the periodontal phenotype. Materials and method – The individuals were categorised into thin and thick phenotypes using visual inspection and the Probe Transparency test. A total of 18 sites in individuals with thin phenotype were selected. I-PRF was prepared using Choukrons protocol (700 rpm for 3 mins). The site with thin phenotype were injected with 0.2ml I-PRF at baseline, 1 week and 2 weeks. The clinical parameters of plaque index, gingival index, width of keratinized tissue and thickness of gingiva were evaluated at baseline, 1 month and 3 months. Results - The data thus obtained was subjected to statistical analysis. The injection of I-PRF showed a significant increase in both width of keratinized tissue and thickness of gingiva at 1 month and 3 months. Conclusion – The injection of platelet rich fibrin in the gingiva may help modify thin periodontal phenotype to thick. It can also help in increase of width of keratinized tissue