Yaak

An API client for modern developers. Call REST, GraphQL, and gRPC APIs from a simple, intuitive app. You’ll love this Postman alternative. Offline, modern, open-source, and extensible. Start instantly by importing data from Postman, Insomnia, or OpenAPI. Yaak appears simple at first glance but comes with everything you need. Reusable variables: Create multiple environments. Reference variables or secrets across requests. Paste cURL commands: Paste any cURL command into Yaak to import it into your current workspace. Smart autocomplete: Suggestions for variable names, headers, and more. No more checking docs. HTTP, GraphQL, or gRPC: Use the same tool for all APIs. Environment variables: Define variables referenceable in environments. Workspaces & folders: Organize into workspaces and nested folders. Batch send requests: Quickly send all requests in a folder. Cookie management: Retain cookies and create multiple jars. Multi-window: Work on multiple workspaces simultaneously. Visual response previews: Render HTML, images, etc. Responsive design: Simple interface that adapts to any window size. Import from other apps: Import from Postman, Insomnia, OpenAPI, or cURL. Paste cURL commands: Paste cURL commands into the URL to import. Copy as cURL command: Copy any request as a runnable cURL command. Local data: All app data is stored locally on your machine.

Yaak is an API client designed for modern developers, supporting REST, GraphQL, and gRPC API calls. It offers a simple and intuitive experience as an alternative to Postman, with offline, modern, open-source, and extensible features.