Copyright-free images are pictures, illustrations, or graphics that can be used for any purpose without permission from the copyright holder. These images are often in the public domain or released under a Creative Commons license that allows for free use, sharing, and modification. Using copyright-free images is a great way to add visuals to your projects, blog posts, or social media without worrying about legal issues.

Here are 12 websites where you can find copyright-free images:
1. Unsplash
2. Pixabay
3. Pexels
4. Gratisography
5. StockSnap.io
6. Burst by Shopify
7. Reshot
8. Picjumbo
9. Kaboompics
10. Rawpixel
11. Freepik
12. Canva

It’s important to note that each website may have its own specific rules for using their images. Be sure to read their terms of use before downloading and using any images.