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https://www.pexels.com/license/

Only free images from our community of photographers are added to our photo database. We constantly try to deliver as many high quality free stock photos as possible to the creatives who use our website. We have hundreds of thousands free stock photos and every day new high resolution photos will be added. All photos are hand-picked from photos uploaded by our users or sourced from free image websites. We make sure all published pictures are high-quality and licensed under the Pexels license.  Attribution is not required. Giving credit to the photographer or Pexels is not necessary but always appreciated.