In addition to all kinds of great collage templates, Canva also allows you to choose from a variety of free stock images for your project.
How to combine photos into a collage using Canva
If you already use Google Photos, you will be able to see all of your photos in your Library. Here's how to use Google Photos on iPhone to create a collage. Google Photos has a similar collage maker that is perfect for quickly combining photos into a collage to share on social media. How to combine photos in a collage using Google Photos Options include Instagram, Facebook, or Camera Roll.