- Send/Cancel/Rerun HTTP request in editor and view response in a separate pane with syntax highlight
Cost / License
- Free
- Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Chrome OS
- Visual Studio Code

Advanced REST Client is described as 'API testing tool. Which allows web developers to create and test custom HTTP requests' and is a API Client in the development category. There are more than 50 alternatives to Advanced REST Client for a variety of platforms, including Mac, Windows, Linux, Web-based and Flathub apps. The best Advanced REST Client alternative is Bruno, which is both free and Open Source. Other great apps like Advanced REST Client are Postman, Insomnia REST Client, Yaak and Fiddler.

Native desktop app for Windows offers high-performance REST and HTTP API testing, low memory and CPU use, custom methods, portable version, proxy support, multiple environments, code generation, multilingual interface, and import/export in light or dark themes.








Kreya is a GUI client for gRPC, REST and WebSocket APIs with innovative features for environments, authorizations and more.




API Tester is the first mobile app to test any type of API on the go. Test REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, and HTTPS APIs completely for free, on iOS or Android.








Milkman is a JavaFx-based workbench for crafting requests / responses. It is not limited to e.g. http (or more specifically rest) requests but can be extended in any imaginable way. It is optimized for fast startup and efficient workflow.


Runscope helps you monitor, log and measure API usage to solve API problems fast. Automatically monitor APIs without any coding. Runscope provides complete logging for all of your API traffic. Track down troublesome API calls with powerful search.



Used httpyac CLI tool underneath, which helps you execute _.http and _.rest files. This can be used to quickly execute a single *.http file, but also to execute all files in a folder. httpyac supports HTTP, Rest, GraphQL, WebSocket und gRPC...


The Zero Trust API Client - A Secure & Free Alternative to Postman , Insomnia & Thunder Client.




This is a tool to manually explore and test HTTP REST webservices. Runs queries from a plain-text query sheet, displays results as a pretty-printed XML, JSON and even images.
