Free APIs, Data & ML
Free online services allow developers to add powerful features to apps and websites without building everything from scratch. These tools include access to weather data, currency exchange rates, news feeds, IP-based location data, image-to-text conversion, and much more. Some services help you design, test, and manage your own APIs, while others provide ready-to-use data for quick integration. This collection is ideal for students, hobbyists, independent developers, and small teams who want to build useful applications and websites without spending money. By using these services with generous free limits, you can save time, reduce complexity, and focus on delivering great user experiences. Every service listed here offers a genuine free tier that persists beyond a short trial, so you can shortlist practical options before you commit to a vendor.
Category directory
Compare free apis, data & ml options
Review the services below, open the details sheet to inspect the free-tier limits, and then jump to the official site when you are ready to validate the latest plan terms.
Abstract API
Abstract API provides a collection of simple and reliable tools that help developers add important features to their applications. You can check where someone is located using their IP address, verify if an email address or phone number is real, validate business tax numbers, and many other everyday tasks. Each tool has its own free usage limit every month, making it easy to test ideas or support small projects without any cost. This service is especially useful for students learning backend development, solo developers building mobile or web apps, and anyone who needs quick, accurate data without writing complex code themselves. The clean and well-documented interfaces make it simple to start using these tools right away.
Free tier snapshot
Each API has its own generous free tier with monthly request limits. Most services allow several thousand free calls per month
Postman
Postman is one of the most popular tools for working with APIs. It helps developers design, test, and share APIs in a simple and organized way. On the free plan, you can create collections of API requests, run tests automatically, collaborate with teammates, and store your work in the cloud. It is widely used by students, individual developers, and small teams to learn API development and make sure their applications communicate correctly with other services. The friendly interface saves a lot of time compared to writing code manually for testing. Whether you are building your first app or working on a larger project, Postman makes the process much smoother and more efficient.
Free tier snapshot
Free forever plan with generous limits on collections, requests, and cloud features. Some advanced collaboration tools have limits
Hoppscotch
Hoppscotch is a fast, lightweight, and completely free tool for sending requests to APIs. It supports many modern types of connections including REST, GraphQL, WebSockets, and more. Because it is open-source, you can use it directly in your browser or run it on your own computer without any account required. It is perfect for developers who want a simple and quick way to test APIs during development. Students and professionals alike love its clean design and speed. You can save your requests, organize them into collections, and even share them with others. It serves as an excellent daily companion for anyone who works with web services regularly.
Free tier snapshot
Completely free and open-source with no usage limits. Can be used online or self-hosted
OCR.Space
OCR.Space is a useful service that can read text from images and PDF files and return it in a clean format. It supports more than 25 languages and works well with scanned documents, photos of text, and printed materials. Developers can easily add this capability to their apps so users can upload pictures and get readable text instantly. This is helpful for building tools that digitize documents, help visually impaired users, or process receipts and forms. The free plan gives you enough requests every month for personal projects, learning, or small applications. The service is fast, accurate, and simple to integrate into websites or mobile apps.
Free tier snapshot
25,000 free requests per month, maximum file size of 1 MB per request. Supports many languages
News API
News API allows developers to search and fetch recent news articles from thousands of newspapers and websites around the world. You can filter news by topic, country, language, or keywords and display them in your own application or website. This is perfect for building news apps, dashboards, notification systems, or content aggregator tools. Students and independent developers often use it to create interesting projects that keep users informed. The free plan provides enough daily requests for personal use and small applications. The simple design makes it easy to get started quickly and deliver fresh news content to your users without any cost.
Free tier snapshot
100 free requests per day for developer accounts. Suitable for personal and non-commercial use
IPInfo
IPInfo provides fast and accurate information about any IP address. You can find the country, city, internet provider, company name, and other useful details. This helps developers add location-based features, detect suspicious activity, or personalize content based on where users are connecting from. The service is trusted by many companies and developers for its reliability and speed. The generous free tier makes it excellent for learning, building side projects, or supporting small applications. Students and solo developers particularly benefit from having access to high-quality IP data without paying for it.
Free tier snapshot
Up to 50,000 requests per month on the free plan. Includes geolocation, company, and other useful data points
OpenAPI3 Designer
OpenAPI3 Designer is a free visual tool that lets you create and edit API specifications using a simple drag-and-drop interface. Instead of writing complex code by hand, you can design your API structure visually and then export it in the standard OpenAPI format. This saves a lot of time and reduces mistakes when building APIs. It is especially helpful for students learning API design, developers who want to document their work clearly, and teams that need to plan services before coding. The tool is completely free to use online and requires no installation or payment.
Free tier snapshot
Completely free to use with no limits on creating, editing, or exporting API designs
Insomnia
Insomnia is a free and open-source application that helps developers design, test, and debug APIs. It supports REST, GraphQL, and other modern API types. You can organize your requests, write tests, and see responses in a clean interface. Many developers prefer it for its speed and powerful features. It works great for learning API development, building personal projects, or working on professional applications. Because it is open-source, you can use it freely on your computer without any account or usage restrictions. It remains one of the best tools for anyone who regularly works with web services.
Free tier snapshot
Completely free and open-source desktop application with no usage limits
Tomorrow.io Weather API
Tomorrow.io provides accurate and detailed weather information through a simple API. You can get current conditions, hourly and daily forecasts, and historical weather data for almost any location in the world. Developers use it to add weather features to travel apps, agriculture tools, event planners, or daily lifestyle applications. The free plan offers enough requests for personal projects and small applications. The data is reliable and updated frequently, making it a great choice for anyone who wants to include weather information in their projects without spending money or dealing with complicated setups.
Free tier snapshot
Free plan with daily request limits. Includes current weather, forecasts, and historical data
UniRateAPI
UniRateAPI delivers real-time exchange rates for more than 590 traditional currencies and cryptocurrencies. You can easily show current prices, convert amounts between different currencies, or build financial tracking tools. This service is useful for creating currency converter apps, payment systems, investment dashboards, or travel expense trackers. The completely unlimited free plan makes it especially attractive for students, hobbyists, and developers building personal finance applications. The simple and fast API design allows you to integrate currency data into your projects quickly and reliably without any cost.
Free tier snapshot
Unlimited API calls on the free plan for both fiat currencies and cryptocurrencies
Always verify free tier limits directly on the provider's website before using in production — free tiers can change over time.