# ELO Web Client
The ELO Web Client assigns file formats to different previews in order to show these file formats in the viewer.
The ELO Web Client viewer supports the following formats:
- BMP
- EML
- GIF
- ICO (web preview only)
- JPG
- MSG
- PNG
- TIFF
- TXT (unformatted text formats)
The individual file formats can be assigned to different previews in the configuration.
Image preview: The graphic formats are shown via the ELO Indexserver.
Web preview: With the web preview, the file to be shown is embedded in an IFRAME element. The display options of the current browser are used.
Microsoft Office documents: Microsoft Office documents can be viewed using Microsoft Web Apps or the ELO Interface for Microsoft Office Online Server (ELOimo), provided that a corresponding Microsoft Office Online Server is available.