XLS
GIF files
XLS (Microsoft Excel spreadsheet) is an older file format used for storing spreadsheet data. Although largely replaced by XLSX, XLS files can still be opened and edited in Microsoft Excel. They contain tabular data with formulas, charts, and formatting.
GIF (Graphics Interchange Format) is an image format known for its support of animations and transparency. GIF files store multiple images in a sequence, creating short animations. They are commonly used for simple web animations and avatars.
Looking for more ways to work with GIF files? Explore these conversions: GIF converter