RandomUser vs RoboHash

RandomUser (the Random User Generator) is a free, open-source API that returns one or more fully-formed fake user profiles — name, address, email, login credentials, and photo — as JSON, XML, CSV, or YAML depending on the format query parameter. Requests can be tuned with parameters for results count, gender, nationality, and a seed value that makes the "random" output reproducible across calls. It has no authentication and no key-based rate limit, making it a common stand-in for Lorem Ipsum-style placeholder people in demos and test fixtures.

RoboHash turns any string — an email address, IP, username, or filename — into a deterministic robot, monster, human, or cat avatar, so the same input always renders the same image. Six selectable sets (robots, monsters, robot heads, cats, human avatars, gorillas) each support size, background (bgset), and Gravatar-based seeding, and images are served directly from the URL by file extension in PNG, JPG, GIF, or BMP. No signup, key, or request body is required, and outputs are freely embeddable under a CC-BY license.