There are many freely available image databases online that have varied licenses. Be sure to always check the licenses.  Some are free to use however you want, some require attribution, some are restricted to non-commercial, and there are other potential parameters.

Please contact us if you have any questions!

Creative Commons https://creativecommons.org/

PixaBay https://pixabay.com/

Shutterstock https://www.shutterstock.com/

UnSplash https://unsplash.com/

Dreamstime https://www.dreamstime.com/

Pexels https://www.pexels.com/royalty-free-images

AdobeStock https://stock.adobe.com/