Fiddler

Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data.

Free Windows

Postman

Postman helps you be more efficient while working with APIs. Postman is a scratch-your-own-itch project. The need for it arose while one of the developers was creating an API for his project.

Freemium Mac OS X Windows Linux Chrome OS Web Chrome

soapUI

Eviware, the maker of soapUI, Web Service Testing Leader soapUI is a tool for functional testing, mainly of web services like SOAP based web services and RESTful web services, but also HTTP based services and JMS Services as well as...

Free Open Source Mac OS X Windows Linux

Paw

Easily craft your HTTP requests, try them, archive them. Setup HTTP Headers, URL parameters, form-encoded POST key-values or text. Get easy-to-read responses with well formatted headers and body.

Commercial

Advanced REST Client (ARC)

API testing tool. Which allows web developers to create and test custom HTTP requests.

Free Open Source Mac OS X Windows Linux Chrome OS Chrome Chromium Chrome Web Store

apptalk.ninja

App and device communication diagnostics tool for better bug tracking & QA. An easy-to-use tool that monitors http, BLE and iBeacon communication over-the-air helping app developers with bug tracking and building more reliable apps.

Freemium iPhone iPad

HttpMaster

Practical and easy-to-use software tool for testing http applications and services.

Freemium Windows

HttpRequester

A tool for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.

Free Open Source Mac OS X Windows Linux Firefox

RESTer

A REST client for almost any web service (Firefox and Chrome extension).

Free Open Source Mac OS X Windows Linux Chrome Firefox

Graphical HTTP Client

HTTP Client is a Mac OS X Leopard developer tool for debugging HTTP services by graphically creating and inspecting complex HTTP messages.

Commercial Mac OS X

RESTed

RESTed allows developers to quickly format and make HTTP requests and view the response. RESTed supports both basic HTTP authentication and OAuth. RESTed shows...

Commercial

GraphicalHttpClient

Graphical Http Client is a utility to help you test and interact with REST-based web services. It is lightweight, easy-to-use, and has the following features: - Set...

Commercial

RESTtest

RESTtest is a simple yet intuitive way to test RESTful web services and standard HTTP calls. RESTtest allows you to enter a HTTP request body and any necessary headers....

Commercial

API Fortress

Automated API testing for the entire lifecycle. No coding, web-based, actually works.

Commercial Web Self-Hosted

Windows RestClient

A Simple Windows application to help developers debug REST based services.

Free Open Source Windows

Rest Client

Rest Client feature rich rest client for developers to debug and test their RESTful web services. It can be used to request a URL using the following HTTP methods: GET...

Commercial Mac OS X

JunoRestClient

JunoRestClient helps you to create, organize and test your REST API quickly. The tool supports Groovy script and test case automate API testing. Supports custom...

Free Windows

REST Client for Android

REST Client for Android is a development tool used to test RESTful web services. Features include: * Save, update, and load requests * Supports all HTTP methods...

Free Android

Restlet

Restlet is the market leader in cloud based API-first software development across all sizes of enterprises and for every provider & consumer of APIs.

Commercial