A curated database of images, videos, and animations of cells highlighting a wide range of organisms, cell types, and cellular processes.
A large collection of user-contributed images available under Creative Commons licenses.
A whimsical collection of free, high-resolution photos by Ryan McGuire, available for personal and commercial use with no copyright restrictions.
A free, peer-reviewed collection of teaching and learning materials, maintained by the California State University System, including images and multimedia.
A community-driven archive of free, high-quality clip art images released into the public domain.
An open-source search engine for openly licensed and public domain content, developed as part of the WordPress project. Openverse indexes over 700 million items, including images and audio, from dozens of sources.
A large collection of high-quality royalty free stock photos and videos shared by creators.
A repository of over 2 million free images, illustrations, vector graphics, and videos released under a CC0-style license for unrestricted use.
An online database from the CDC featuring public health–related images, illustrations, and multimedia.
A resource for free, CC0 stock photos with thousands of high-resolution images added weekly.
An aggregator that combines multiple free stock photo, video, and design resources into one searchable platform.
A popular collection of high-quality, free-to-use images contributed by photographers worldwide. Suitable for commercial and non-commercial use without attribution.
A massive, community-maintained media repository hosted by the Wikimedia Foundation. It includes millions of free-to-use images, sounds, videos, and other media files.
A digital collection featuring openly licensed images of artworks and cultural artifacts from Yale’s extensive art holdings.
When using openly licensed or public domain images, always check the license terms. Some require attribution, while others (like CC0/“no rights reserved”) do not.
Check the license: Look for Creative Commons (CC) or Public Domain (PD/CC0) information.
Give credit when required: Most CC licenses (e.g., CC BY) require attribution.
Include key elements: Creator’s name, title of the work, source link, and license type.
Keep it visible: Place attribution where readers/viewers can see it (caption, credits slide, or bibliography).
“Sunset Over Lake” by Jane Doe, via Unsplash, licensed under CC BY 4.0.