ISO is a archive format: it stores data in the ISO format. LZ is a document format that stores data in the LZ format. This extracts the document from the archive so it can be opened directly. Metadata such as creation date and embedded colour profiles is preserved where the target format supports it. Converting between these two formats is common when the source application does not support LZ natively or when the target platform only accepts LZ. 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.