Top 10 Websites for Free APIs

1. AquaScript

AquaScript is a comprehensive free API hub that provides instant access to various APIs without requiring signups or API keys. It's designed specifically for developers who need quick access to mock data for their projects [citation:7][citation:9].

Website: https://aquascript.xyz

Key Features:

• Zero authentication required - start using APIs instantly
• Ultra-fast response times with global CDN support
• CORS enabled for frontend development
• Unlimited requests with no rate limits
• Clean and minimal JSON structure for easy integration

Available APIs:

• Books API - Access to books, authors, and summaries
• Movies API - Random movie data for streaming apps
• Quotes API - Motivational and life quotes
• Jokes API - Programming jokes and general humor
• Recipes API - Perfect for culinary applications
• Songs API - Song titles and artists data
• Users API - Random user profile generation

AquaScript is particularly valuable for frontend developers working with React, Next.js, Vue, or Angular; mobile app developers using React Native or Flutter; and students or hackathon participants who need quick solutions [citation:9].

2. Public APIs GitHub Repository

This GitHub repository is a meticulously curated list of free APIs organized by categories, making it easier for developers to discover and integrate diverse functionalities into their applications [citation:1].

Website: https://github.com/public-apis/public-apis

Key Features:

• Extensive collection of APIs from numerous domains
• Community-managed and regularly updated
• Clear information about authentication requirements
• HTTPS and CORS support indicators
• Well-organized categorization system

API Categories:

• Animals - Pet adoption, animal facts, and images
• Anime - Anime discovery, tracking, and quotes
• Anti-Malware - IP/Domain reputation and threat detection
• Art & Design - Color schemes, icons, and museum data
• Authentication & Authorization - Auth services
• Blockchain - Cryptocurrency and blockchain data
• Books - Religious texts and bibliographic data
• And many more categories

The Public APIs repository is particularly valuable because it's community-driven, which means it's constantly updated with new APIs and removal of outdated ones. Each API listing includes important details such as authentication requirements, HTTPS support, and CORS availability, helping developers make informed decisions quickly [citation:1].

3. API List

API List is a public directory of free APIs that allows developers to explore and find APIs for their specific needs across various categories [citation:5].

Website: https://apilist.fun

Key Features:

• User-friendly interface for API discovery
• Detailed information about each API
• Search functionality to find specific APIs
• Regular updates with new APIs
• Community contributions

API List provides concise descriptions and direct links to API documentation, making it easy for developers to quickly evaluate whether an API meets their requirements.

4. APIPheny

APIPheny offers a curated list of free APIs that don't require API keys, making them particularly accessible for beginners and rapid prototyping [citation:6].

Website: https://apipheny.io/free-api/

Key Features:

• APIs organized by category
• No API key requirement for listed APIs
• Beginner-friendly explanations
• Regularly updated collection
• Focus on practical, usable APIs

Notable APIs Listed:

• Cat Facts - Random cat facts
• CoinDesk - Bitcoin Price Index
• Bored - Activity suggestions
• Agify.io - Age prediction based on name
• Genderize.io - Gender prediction based on name
• Nationalize.io - Nationality prediction based on name
• Data USA - US public data
• Dogs - Random dog images
• IPify - IP address information
• Jokes - Random jokes

APIPheny is particularly valuable for developers who are new to working with APIs, as it removes the barrier of API key authentication while providing interesting and practical APIs to experiment with [citation:6].

5. Google Fonts

Google Fonts provides a free, extensive collection of web fonts that can be easily integrated into any website through a simple API [citation:3][citation:8].

Website: https://fonts.google.com

Key Features:

• Extensive library of free, open-source fonts
• Easy integration with minimal code
• CDN delivery for improved performance
• Font effects and customization options
• Open-source and free for commercial use

Implementation Example:

<head>
  <link rel="stylesheet" 
    href="https://fonts.googleapis.com/css?family=Font+Name">
  <style>
    body {
      font-family: 'Font Name', serif;
    }
  </style>
</head>

Google Fonts also supports advanced features like font effects, which can be enabled by adding effect parameters to the API request [citation:8]. For example:

<link rel="stylesheet" 
  href="https://fonts.googleapis.com/css?family=Sofia&effect=fire">

Then applying the effect with:

<h1 class="font-effect-fire">Sofia on Fire</h1>

With over 1000 fonts available, Google Fonts API is an essential resource for web developers looking to enhance their typography without worrying about licensing issues or self-hosting font files [citation:3].

6. Google Material Icons

Google Material Icons provides a comprehensive set of vector icons that can be easily integrated into web projects through a font-based system or SVG [citation:4][citation:10].

Website: https://fonts.google.com/icons

Key Features:

• 900+ icons in a single, small file
• Vector-based for sharp rendering at any size
• Easy to customize with CSS
• Available via Google CDN or self-hosting
• Free to use under Apache License Version 2.0

Implementation Methods:

Method 1: Using via Google Fonts (Simplest)

<head>
  <link rel="stylesheet"
    href="https://fonts.googleapis.com/icon?family=Material+Icons">
</head>
<body>
  <i class="material-icons">face</i>
</body>

Method 2: Self-hosting

@font-face {
  font-family: 'Material Icons';
  font-style: normal;
  font-weight: 400;
  src: url(https://example.com/MaterialIcons-Regular.woff2) format('woff2');
}

.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  display: inline-block;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'liga';
}

Material Icons can be easily sized and colored using CSS:

<!-- Different sizes -->
<i class="material-icons md-18">cloud</i>
<i class="material-icons md-24">cloud</i>
<i class="material-icons md-36">cloud</i>
<i class="material-icons md-48">cloud</i>

<!-- Different colors -->
<i class="material-icons" style="color: #FB8C00;">face</i>
<i class="material-icons orange600">face</i>

With their clean, modern design and easy implementation, Material Icons have become a standard resource for web and app developers [citation:4].

7. JSONPlaceholder

JSONPlaceholder is a fake online REST API for testing and prototyping, providing typical JSON data for common resource types.

Website: https://jsonplaceholder.typicode.com

Key Features:

• No registration or API key required
• RESTful interface with standard HTTP methods
• Simulates real API responses
• Support for all common HTTP operations
• Multiple resource types available

Available Resources:

• /posts - 100 posts
• /comments - 500 comments
• /albums - 100 albums
• /photos - 5000 photos
• /todos - 200 todos
• /users - 10 users

JSONPlaceholder is particularly valuable for frontend developers who need to test their applications with realistic data before connecting to actual backend services.

8. OpenWeatherMap

OpenWeatherMap provides comprehensive weather data API access, including current weather, forecasts, and historical data.

Website: https://openweathermap.org/api

Key Features:

• Free tier with generous usage limits
• Current weather data for any location
• 5-day weather forecast with 3-hour intervals
• Historical weather data
• Weather maps and precipitation data

While OpenWeatherMap offers paid plans with additional features, its free tier provides more than enough functionality for most personal projects and learning applications.

9. REST Countries

REST Countries provides information about countries worldwide through a simple RESTful API, making it ideal for developing geographic applications.

Website: https://restcountries.com

Key Features:

• No authentication required
• Information about 250+ countries
• Multiple fields including name, capital, currency, language
• Filtering by various criteria
• Regularly updated data

REST Countries is particularly useful for developers building applications that need country data, such as international e-commerce sites, travel applications, or educational tools.

10. TheCatAPI

TheCatAPI provides extensive cat-related images and data, offering a fun way to practice API integration while adding engaging content to applications.

Website: https://thecatapi.com

Key Features:

• Extensive collection of cat images
• No API key required for basic usage
• Breed information and search
• Voting and favorite functionality
• Upload functionality (with API key)

While seemingly whimsical, TheCatAPI provides a practical way for developers to practice working with APIs that include image manipulation, voting systems, and user favorites.