Classification and File Exchange in SketchUp: A BIM Workflow Guide

SketchUp’s official help documentation explains how to add classification data to model entities and work with different file formats. This guide is based on the Classifier document, updated on 15 October 2026, and information in other SketchUp documentation. Since the sources do not specify a particular SketchUp version number, check menu options and file-format support in the version you use. The steps below cover desktop classification workflows and SketchUp for iPad file options separately.

1. Use classification data in your model

SketchUp Classifier can associate classification information with groups or components in a model. This lets you describe objects not only by their geometry, but also by information that can be useful in BIM workflows. This data can help organize the model, track objects, and review them for different purposes.

With Classifier, you can manage information about objects’ measurements and dimensions, assign labels, and track quantities in the model. After applying classifications, you can also create a report based on attributes. This report makes it easier to export and review information stored in the model. SketchUp documentation also discusses evaluating model data in areas such as energy performance or cost; the results depend on the information available in the model.

Before you begin, it’s useful to decide which group or component should hold the classification information. Associating the data with the correct object makes it easier to search the model and prepare reports. This is not a modeling rule required by the documentation, but a practical suggestion for keeping classification data organized.

2. Import and share classifications

To add a classification file in desktop SketchUp:

1. Open Window > Model Info.

2. Go to the Classifications section in Model Info.

3. Select Import. If the file is in the classifications folder, open it from the list; if it is elsewhere, use Browse to locate it.

4. Select the .skc or .xsd file and complete the import.

The imported classification is embedded in the SketchUp model file. This means the classification data travels with the model when you send the file to another user, who can then use it in their copy of SketchUp. Classifications can also be saved as SKC files for use in other SketchUp models.

To export a classification contained in the model, use the Export option in the same Classifications section. This saves the classification to your computer as an .skc file. To remove a classification from the model, use the Delete option. This removes not only the classification record, but also its associated type and attribute information from the SketchUp file. Classification files stored separately on your computer are not affected when you delete a classification from the model.

SKC is one way to transfer classification information between SketchUp files. IFC is described as a standard format for exchanging information between different BIM applications. IFC files can contain data such as building components, geometry, and pricing information. SketchUp documentation also notes that classifications can be imported and exported in IFC format.

3. Check file formats and subscription plans

Desktop SketchUp documentation lists access to file formats by subscription plan. The table below summarizes this coverage:

This list does not mean that every format is available for both import and export. For example, the official table links to export documentation for FBX and KMZ. Before starting a workflow, check whether you need to import or export the format and whether it is included in your plan.

SketchUp for iPad format support should be considered separately from the desktop subscription table. The iPad documentation lists image files, PDF, SKP, STL, DWG/DXF, DAE, KMZ, 3DS, DEM, and DDF for import. Export options include PNG, MP4, USDZ, STL, OBJ, DWG/DXF, and PDF.

When importing a PDF on iPad, you can set the scale for drawings on its pages; SketchUp can then place the drawing at 1:1 scale based on that setting. PDF export can create multiple pages. You can choose options such as page layout, resolution, and scenes in the output; you can also adjust the line-weight multiplier and the graphics type to use. Some formats may not be available when exporting from the Home page or Trimble Connect. For example, you cannot export a 2D AutoCAD drawing from the Home page; the documentation says this is related to camera requirements.

4. Considerations for architecture and visualization workflows

Architects and interior designers can use classification to organize information about building components in a model and support reporting. In BIM workflows, IFC is an important option for teams looking to exchange data between different applications. However, the fact that a file format appears in the list does not guarantee that all data will be preserved in the same way in the target application; the documentation makes no such compatibility guarantee.

When sharing classification data with your team, determine what information is needed alongside the model. Embedded classification travels with the model, but deleting a classification also removes its associated attributes from the model file. For file exchange, check the subscription requirements and transfer direction as well as the file extension.

Common mistakes:

• Overlooking that deleting a classification also removes its associated type and attribute information from the model.

• Seeing a file extension among the supported formats without checking the required subscription plan.

• Assuming that the same formats are available in every export location in SketchUp for iPad.

• Forgetting to specify the scale setting when importing a PDF drawing.

Since the official sources do not specify a particular software version number, it’s a good precaution to check the options available in your installation before important deliveries. For IFC, DWG/DXF, or PDF transfers in particular, test a sample file to confirm that the target file contains the required geometry and information.