A fast, privacy-first API client for REST, GraphQL, SSE, WebSocket, and gRPC – built with Tauri, Rust, and React.
Development is funded by community-purchased licenses. You can also become a sponsor to have your logo appear below. 💖
Download Yaak for macOS, Windows, or Linux from yaak.app/download. Package managers and other install methods are in the installation docs.
Yaak is an offline-first API client designed to stay out of your way while giving you everything you need when you need it. Built with Tauri, Rust, and React, it’s fast, lightweight, and private. No telemetry, no VC funding, and no cloud lock-in.
- Import collections from Postman, Insomnia, OpenAPI, Swagger, or Curl.
- Send requests via REST, GraphQL, gRPC, WebSocket, or Server-Sent Events.
- Filter and inspect responses with JSONPath or XPath.
- Use OAuth 2.0, JWT, Basic Auth, or custom plugins for authentication.
- Secure sensitive values with encrypted secrets.
- Store secrets in your OS keychain.
- Group requests into workspaces and nested folders.
- Use environment variables to switch between dev, staging, and prod.
- Mirror workspaces to your filesystem for versioning in Git or syncing with Dropbox.
- Insert dynamic values like UUIDs or timestamps with template tags.
- Pick from built-in themes or build your own.
- Create plugins to extend authentication, template tags, or the UI.
Important
Community PRs are currently limited to bug fixes.
If your PR is not a bug fix, link the feedback item where @gschier explicitly gave you permission to work on it.
See CONTRIBUTING.md for policy details and DEVELOPMENT.md for local setup.
The source is MIT licensed and can be built and run for free, for both personal and commercial use.
The prebuilt binaries follow Yaak's pricing terms: free for personal use, license required for commercial use.