If you've ever received a SKP file and needed to open it but didn't have SketchUp installed on your computer, you're in luck! There are several online tools and viewers that allow you to open SKP files without the need for any specific software. Here's how you can do it:

1. Use SketchUp Free: SketchUp offers a free web-based version of their software called SketchUp Free. You can simply upload your SKP file to their website and access it using your web browser. This is a great option if you only need to view the file and not make any edits.

2. Online SKP Viewers: There are several online SKP viewers available that allow you to upload and view SKP files without the need for SketchUp software. Some popular options include SketchUp Viewer, Clara.io, and Modelo. These viewers provide a simple and convenient way to access SKP files online.

3. Convert SKP to other Formats: If you're unable to open the SKP file directly, you can use online file conversion tools to convert it to a more accessible format such as STL or OBJ. Websites like AnyConv and OnlineConvert offer simple tools to convert SKP files to other formats that can be opened with a wider range of software.

By using these methods, you can easily open SKP files online without the need for any special software or plugins. Whether you just need to quickly view a SKP file or convert it to a different format, these tools provide convenient solutions for accessing SKP files on the web.