PostDICOM is a comprehensive, cloud-based DICOM viewer and medical imaging management platform that facilitates the easy viewing, storage, and sharing of DICOM files directly through any contemporary web browser. This versatile tool accommodates a diverse range of imaging modalities, such as CT, MRI, ultrasound, PET, and X-ray, allowing users to access their studies remotely without the necessity of installing additional software. Equipped with an array of advanced features, PostDICOM supports both 2D and 3D image viewing, enables multiplanar reconstruction (MPR), and allows for image fusion capabilities. Users have the ability to annotate images, perform measurements, adjust brightness and contrast, and implement window leveling to enhance their analysis. Furthermore, it provides a management system for teaching files, making it an invaluable resource for educational purposes by enabling the creation and organization of teaching cases. With the collaborative workspaces feature, medical professionals can work together efficiently while managing user access permissions for enhanced workflow. Additionally, PostDICOM prioritizes data security and privacy by including tools for patient data anonymization and adhering to HIPAA standards. This combination of functionality and compliance makes it an essential tool in modern medical imaging practice.