First, take look at how some of the world's best websites and applications use free stock image API in their platform. Medium one of the largest blogging platform allows image search using Unsplash API. Canva one of the best online image editing platform has Pixabay integration.
As a part of your application or service, there are situations where it needs a large number or collection of images. One option is if you have your own collection of images. Or there are free stock photography websites that offer free API.
These are the best free image API's which servers CC0 royalty-free stock images.
Best Free Image API (CC0 Royalty Free Stock Images API)
1) Unsplash API
Unsplash is one of the world's largest royalty-free CC0 images website. Unsplash has a Beautiful, free image gifted by the world’s most generous community of 90,000+ photographers and creators. With a huge library of 550,000+ photos and thousands more being added each day.
The Unsplash API is a modern JSON API that provides all of the info needed to build any experience for your users. There are over 1000+ applications have been built using Unsplash API.
- Unlimited requests for free: Unsplash API fast and flexible, and completely free to use.
- Can handle high volume: Even Unsplash.com runs on it.
- Simple to setup
2) Pixabay Developer API
Pixabay Developer API gives access to over 1.7 million photos, illustrations, vector graphics, and videos - for free.