HEIF is a document format: it stores data in the HEIF format. RTF is a document format that encodes formatted text using a plain-text markup syntax readable by most word processors across platforms. 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 RTF natively or when the target platform only accepts RTF. 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.