If you are working on 3D models in Blender and want to share or use them in other applications, saving them as an OBJ file is a common and efficient way to do so. Here's how you can save your creations as OBJ files in Blender.

1. Once you have finished modeling your object, make sure it is selected in the 3D Viewport.

2. Go to 'File' in the top-left corner of the Blender interface and select 'Export' > 'Wavefront (.obj)'.

3. In the 'Export OBJ' window that appears, you can set the export options according to your preferences. You can choose to include materials, normals, and other data depending on the requirements of the application you intend to use the OBJ file in.

4. Choose a location on your computer where you want to save the OBJ file, enter a file name, and click 'Export OBJ' to save your 3D model as an OBJ file.

By following these simple steps, you can easily save your 3D models as OBJ files in Blender and use them in other applications or share them with others. OBJ files are widely supported across different 3D modeling and rendering software, making them a versatile and convenient file format for sharing 3D models.

In addition to being compatible with various software, OBJ files are also relatively lightweight and easy to work with, which makes them ideal for sharing and using 3D models in different projects.

Now that you know how to save your 3D models as OBJ files in Blender, you can easily share your creations with others or use them in other applications without any compatibility issues. Whether you are creating assets for a game, visualizations for architecture, or any other 3D modeling project, the ability to save your work in a widely-used file format like OBJ can streamline your workflow and collaboration with others.

So, next time you finish modeling a stunning 3D object in Blender, remember to save it as an OBJ file using the simple steps outlined above, and you'll have a versatile and widely-compatible file ready to be used in any of your future projects.