The XLS file format stores data in the XLS format. Converting to PDF produces a document file that stores fixed-layout pages with embedded fonts, vector graphics, and page geometry defined by ISO 32000. This converts the tabular data into a fixed-layout document suitable for printing or sharing. Metadata such as creation date and embedded colour profiles is preserved where the target format supports it. This makes PDF the practical choice when the destination system requires it or when the original format is not supported by the target application. 1converter runs this conversion on the server: your file is uploaded encrypted over HTTPS, converted using trusted open-source libraries, and the output is held for 24 hours before automatic deletion.