# File formats overview

QuNex tools support a number of file formats that enable broad compatibility. Some historical file formats have been adopted from the set of tools developed by Washington University in St. Louis Neuroimaging Laboratories (NIL) neuroimaging community, whereas others have been added for specific support of QuNex tools.

QuNex supports both `*.nii` and all CIFTI file format specifications (e.g. `*.dtseries.nii`, `*.dscalar.nii`, etc.).

The following files enable various QuNex functionality and are described in detail below:

* [Session acquisition information files](Overview-FileSession)
* [Session pipeline information files](Overview-FileSessionPipeline)
* [Mapping specification files](Overview-FileMapping)
* [Batch files](Overview-FileBatch)
* [List files](Overview-FileList)
* [Event timing files](Overview-FileFidl)
* [Concatenation files](Overview-FileConc)
* [Region of interest specification files](Overview-FileROI)