There are a few ways to make a photo look like a Polaroid. For example, you can import a Polaroid template into graphic editing software like GIMP or Photoshop Elements, or you can use a web-based tool that adds Polaroid frames to images. There are also plenty of mobile apps that will convert your photos into Polaroids.
How to Make a Polaroid Template in Photoshop
Tuxbi is a web-based photo editing tool that offers hundreds of free borders and other graphic assets. To frame a photo to look like a Polaroid with Tuxbi:
Go to Tuxbi.com and select Start Photo Editing.
Select the image on your computer that you want to use and click or tap Open.