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Free REST APIs for Testing and Development

Access 25+ free, no-authentication REST APIs perfect for testing, prototyping, and learning web development. All endpoints return JSON responses and are available instantly without registration or API keys.

Why Use These Free APIs?

Whether you're building a proof of concept, learning API integration, or testing your frontend applications, these free APIs provide reliable, instant data without the hassle of authentication, rate limits, or signup processes.

  • No Authentication: Start using immediately without API keys or tokens
  • CORS Enabled: Perfect for frontend JavaScript applications and browser testing
  • Reliable Uptime: Production-ready endpoints you can depend on
  • Multiple Categories: Images, random data, IP info, mock JSON data, and more

Image Placeholder API

Generate custom placeholder images on the fly. Perfect for testing layouts, wireframes, and prototypes before final images are ready. Customize dimensions and add text overlays to simulate real content.

Dynamic Image Placeholder Generator

Endpoint
GET https://terabit.vercel.app/apis/images/placeholder?w=400&h=300&text=Hello

Query Parameters

  • w — Image width in pixels (default: 400, accepts any positive integer)
  • h — Image height in pixels (default: 300, accepts any positive integer)
  • text — Custom text overlay on the image (optional, URL-encoded string)

Use Case: UI mockups, responsive design testing, loading states, image galleries

Response

Response will load when JavaScript is enabled

IP Address Lookup API

Retrieve the public IP address of the requesting client. Essential for geolocation features, security logging, analytics, and network diagnostics. Returns IPv4 or IPv6 addresses in JSON format.

Get Public IP Address

Endpoint
GET https://terabit.vercel.app/apis/ip/public
Response

Response will load when JavaScript is enabled

JSON Placeholder Data API

Complete mock REST API with realistic sample data for common application entities. Ideal for building and testing CRUD operations, list views, detail pages, and data-driven components without setting up a backend.

Get Album Collection

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/albums
Response

Response will load when JavaScript is enabled

Get Category List

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/categories
Response

Response will load when JavaScript is enabled

Get Comments Data

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/comments
Response

Response will load when JavaScript is enabled

Get Message Threads

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/messages
Response

Response will load when JavaScript is enabled

Get Notifications Feed

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/notifications
Response

Response will load when JavaScript is enabled

Get Photo Gallery Data

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/photos
Response

Response will load when JavaScript is enabled

Get Blog Posts Collection

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/posts
Response

Response will load when JavaScript is enabled

Get Product Catalog

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/products
Response

Response will load when JavaScript is enabled

Get User Profiles

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/profiles
Response

Response will load when JavaScript is enabled

Get Stories Feed

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/stories
Response

Response will load when JavaScript is enabled

Get Tag Collection

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/tags
Response

Response will load when JavaScript is enabled

Get Todo List Items

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/todos
Response

Response will load when JavaScript is enabled

Get Users Directory

Endpoint
GET https://terabit.vercel.app/apis/jsonplaceholder/users
Response

Response will load when JavaScript is enabled

Random Data Generator API

Generate random data on demand for testing edge cases, populating mockups, or creating demo content. Each request returns fresh randomized values across multiple data types.

Random Color Generator

Endpoint
GET https://terabit.vercel.app/apis/random/color
Response

Response will load when JavaScript is enabled

Random Name Generator

Endpoint
GET https://terabit.vercel.app/apis/random/name
Response

Response will load when JavaScript is enabled

Random Number Generator

Endpoint
GET https://terabit.vercel.app/apis/random/number
Response

Response will load when JavaScript is enabled

Random Password Generator

Endpoint
GET https://terabit.vercel.app/apis/random/password
Response

Response will load when JavaScript is enabled

Random UUID Generator (v4)

Endpoint
GET https://terabit.vercel.app/apis/random/uuid
Response

Response will load when JavaScript is enabled

Current Time API

Retrieve accurate server time in multiple formats. Useful for timestamp testing, time zone conversions, and ensuring consistent time references across distributed systems.

Get Current Server Time

Endpoint
GET https://terabit.vercel.app/apis/time
Response

Response will load when JavaScript is enabled

Domain WHOIS Lookup API

Query domain registration information including registrar details, creation dates, expiration dates, and nameserver configuration. Essential for domain research and monitoring tools.

WHOIS Domain Information Lookup

Endpoint
GET https://terabit.vercel.app/apis/whois

Query Parameters

  • domain — Target domain name to lookup (required, example: vercel.com, google.com, github.com)

Use Case: Domain availability checks, competitor research, security audits, DNS management

Response

Response will load when JavaScript is enabled

earth.info API

Get structured country data like ISO codes, capital city, region, currency, language, flag, and calling codes — ready to use in any global application.

Get every country on Earth

Endpoint
GET https://terabit.vercel.app/apis/earth.info

Parameters

  • /earth.info/EG — Returns data for Egypt
Response

Response will load when JavaScript is enabled

Getting Started with These APIs

All endpoints accept standard HTTP GET requests and return JSON responses. Simply make a fetch request from your JavaScript code, cURL command, or any HTTP client. No registration, no API keys, no complexity.

Quick Example

Perfect for frontend developers, QA testers, coding students, and anyone building proofs of concept. Start integrating these free REST APIs into your projects today.