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Sends features to the FME Data Inspector (or the FME Universal Viewer) for display. (The application that opens depends on the Inspection Application setting in Tools > FME Options > Workbench.)

When the workspace run is completed, any features that enter this transformer will be displayed in the FME inspection application. The Inspector also allows you to view the internal FME Feature Store (FFS) data as it is being processed at that particular moment. Depending on the placement of the Inspector, FME will open the Inspector and load the data in a new view.

All Inspector transformers used in a workspace will be displayed in the same view.

A feature type in the Inspector application will have the same name as its corresponding Inspector transformer.

Input Ports

This transformer has a single unnamed input port that accepts any feature.

Output Ports

This transformer has no output ports.


Vector Parameters

Raster Parameters

Point Cloud Parameters

Usage Notes

This is a very useful tool for debugging workspaces. Keep in mind, however, that you are viewing the internal FME data, which may not be the same as the data eventually written to your output dataset. This is because FME does not apply any format-imposed restrictions on the data.


  • To attach an Inspector transformer: right-click on a selected reader feature type or transformer and choose Connect Inspector(s).
  • Click the Inspector button to place an Inspector transformer in a workspace.
  • To immediately open the Viewer, right-click on a reader or writer feature type and select Inspect.

Redirecting Output to an Inspector

In some cases you might want to inspect output data, but you don't want to actually have to write the data to do so. For example, in a translation that applies updates to a spatial database, you will probably want to check the output before actually committing an update. The answer is the Redirect to Inspector Application setting.

When this setting is applied, the output from a translation is redirected away from the specified output and sent directly to the viewer specified by the Inspector Application setting in Tools > FME Options > Workbench.

The simplest way to turn on this feature is to select Writers > Redirect to Inspector Application from the Workbench menu bar. This is a toggle setting, meaning that each selection turns the setting on or off.

Transformer History

This transformer was previously named the Visualizer.


The FME Data Inspector help files contain additional information about viewing and saving raster, point cloud, and vector data.

Editing Transformer Parameters

Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.

Transformer Categories


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Tags Keywords: Visualizer