HDR is a document format: it stores data in the HDR format. PDF is a document format that stores fixed-layout pages with embedded fonts, vector graphics, and page geometry defined by ISO 32000. This conversion changes the file's encoding, compression method, and supported feature set. Text content, headings, and basic formatting are transferred; complex features such as macros or embedded objects may not translate fully. Converting between these two formats is common when the source application does not support PDF natively or when the target platform only accepts PDF. 1converter processes this conversion server-side using open-source tools. Files are transferred over HTTPS, converted on secure cloud servers, and automatically deleted after 24 hours.