> For the complete documentation index, see [llms.txt](https://xiv.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xiv.dev/game-data/file-formats.md).

# File Formats

## [Excel](/game-data/file-formats/excel.md)

Excel is the relational data storage system that the game uses to store information, similarly to a relational database. The structure of EXL, EXH and EXD files are documented here.