Best API Tester - REST Client Testing Tool Alternatives in 2026

About API Tester - REST Client Testing Tool

This is simple REST Client. Use it to develop, test, debug RESTful APIs, HTTP APIs and and easy-to-use UI. This has a number of powerful features than postman... Favorites: - Save favorite requests (including headers, payload etc.) and re-use them with the click of a button. - Import/Export favorites. - Your favorites are automatically synced with your Google account and are not tied to a single machine. History: - View all your previous requests and responses. - Easily run them again. - Easily filter out the requests you're not interested in. Custom Headers: - Choose from a large range of existing request headers. - Create and save your own custom request headers. More... - View the request response in beautiful syntax highlighting (including JSON, XML, HTML and CSS). - See how long each request took to complete. - Supports GET, POST, PUT and DELETE request methods. Custom request methods can also be added by the user. - HTTP Basic Authentication. - Responsive Design. - Dark Mode. - 100% Free. No strings attached. Note on Extension Permissions: The badly named "Read and change all your data" permission is required to send a request to any domain. This does not access or use your data in any way.