Gloved hand with a 96-well laboratory dish containing dilutions of a violet substance. Concept of clinical trials and diagnostic tests. stock photo...

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What's a royalty-free license?

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that content. It's a win-win, and it's why everything on iStock is only available royalty-free — including all Assay - Scientific Procedure images and footage.

What kinds of royalty-free files are available on iStock?

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Learn more about royalty-free images or view FAQs related to stock photos.