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REST Countries is a free API that provides information about all countries in the world. Get data like name, capital, region, population, currencies, languages, flags, and more. No API key required.

Frankfurter is a free, open-source currency conversion API that provides up-to-date exchange rates. It uses data from the European Central Bank and supports all major currencies with no rate limits.

TheMealDB is a free open database of recipes from around the world. The API provides meal categories, recipes by area, ingredients, and full recipe details including instructions.

Dog CEO API is a free public API for dog images. Get random dog images, list all breeds, or fetch images by breed. Great for testing, demos, or fun projects.

Lorem Picsum provides free, random placeholder images. Just append width/height to the URL to get images of any size. No API key or registration required.

Pravatar provides free random realistic avatar images. Each image is a unique generated face using AI. Great for user profiles, testing, and mockups. No API key required.

UI Avatars generates avatars based on initials and background color from names. Perfect for placeholder user avatars in apps. Simple URL-based API with no registration.

DiceBear is a free avatar library with multiple styles (avataaars, personas, icons, etc.). Offers both API and SVG downloads. Great for generating consistent, diverse avatars.

Boring Avatars is a free avatar library that generates unique, SVG-based avatars from names. Multiple color schemes and shapes. No dependencies and lightweight.

Avataaars Generator creates cartoon-like avatar illustrations. Free to use with customizable features like hair, accessories, and colors. API available.

The most-starred curated directory of public APIs on GitHub, categorized across finance, games, machine learning, maps, science, weather, and dozens more. Each entry lists authentication requirements, HTTPS support, and CORS availability. Perfect hunting ground when you need free data for a side project.

Fake online REST API with ready-made /posts, /comments, /albums, /todos, and /users endpoints returning realistic data. Zero setup and no authentication required, making it the standard backend stand-in for tutorials, demos, and prototyping frontends.

Generate up to 1,000 rows of realistic test data per day for free in CSV, JSON, SQL, Excel, and more. Choose from 150+ typed fields (names, emails, addresses, custom schemas), define relationships between fields, and use the API to automate test fixtures.