How To: Find what image formats are supported by ArcGIS
ArcGIS supports many different raster formats for both reading and writing.
Formats that ArcGIS can read (display) are found in ArcGIS Desktop Help. Select Start > Programs > ArcGIS > Desktop Help Under the Contents tab go to ArcCatalog > Working with rasters > Supported raster formats.
Formats that ArcGIS can write (create) are TIFF, ESRI Grid, ERDAS Imagine, and ArcSDE Raster (ArcEditor and ArcInfo only).