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Yaak
v2025.9 → ARM Builds and 1Password

The API client for modern developers

A fast, secure, and offline API client that works with Git.

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98k
Open Source

Apple Linux Available for Mac, Windows, and Linux

Fast and private

Local-only data, secrets encryption, and zero telemetry.

Works with Git

Optionally store data as plain-text for Git, DropBox, etc.

Extend with Plugins

NodeJS plugin system for auth, template functions, and more.

My API Production › List Launches Content WS Chat Server 101 GRPC Users/Create ERR GET Get Video 206 API WS Create User 400 GRPC Users/Create ERR GQL List Launches 200 GET Event Stream 200 POST Get Video 206 PUT comments/:id 200 main POST BASE_URL /graphql GraphQL Params Headers 3 Auth 1 2 3 4 5 6 7 8 9 10 launcheslimit    details     id     launch_date     launch_sitesite $limit$limit (: ) {   (: ) { {           }   } } query LaunchesInt | Variables 1 2 3 10 "count" { : } • 480 ms • 2 KB 200 OK Pretty Headers 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 [ null null null "Engine failure""5eb87cd9ffd""2006-03-25""Successful stage""5eb87cdaffd""2007-03-21""Residual thrust""5eb87cdbffa""2008-08-03""Ratsat was carried""5eb87cdbffd86e000604b32c" "data""details""id""launch_date""launch_site""details""id""launch_date""launch_site""details""id""launch_date""launch_site""details""id" {   :     {       : ,       : ,       : ,       :     },     {       : ,       : ,       : ,       :     },     {       : ,       : ,       : ,       :     },     {       : ,         : , a site_id a site_name a site_name_long

Hey, I'm Greg 👋🏼

Having created and sold Insomnia in 2019, I didn't think I'd build another API client, but the tools changed for the worse and I found myself looking for something better.

I started over and built something I'm proud to put my name behind.

Trusted by developers

Modern, offline, open source, Git friendly, and extensible. What's not to love?

Elias
When I was looking for a clean and simple API client a few months ago, I came across Yaak ... I just love clean UI and lack of clutter.
EGOIST
Yaak is now my first choice for API testing, light-weight yet powerful ✅ (powered by @TauriApps again)
mariodev ⚡
First it was Postman, then insomnia was the new kid in the block, these two suckers got old and smell corpo from miles away, it is time now for yaak.app
JustSteveKing
I've been using @yaakapp for a while now, and I absolutely love it! If you need a https client for your desktop, go check it out
Müjdat Korkmaz
I definitely recommend it. I tried others as well, but so far I find Yaak to be the most complete open source alternative to Postman

Developer friendly

Work in the ways you're already used to.

Everything you need

Yaak's keeps things simple by default, exposing features only when needed.

Start from anywhere

Integrate with your existing workflow by importing data from many places:

PostmanInsomniaOpenAPICurlSwagger

Call any API

Mix multiple protocols together and work on any API within a single workspace.

RESTHTTPGraphQLgRPCWebSocketServer Sent Events

Authenticate anything

Automatically handle complex request authentication, so you don't have to:

OAuth 2.0AWS v4JWTBasicBearerAPI KeyCustom

Request chaining
Variables
Encrypted secrets
Auth inheritance
Batch send
Custom proxy
Cookies
Rich previews
Import/export
Paste Curl
Copy as Curl
Streaming
Git UI
Command palette
Autocomplete
Request docs

Constantly improving

Your feedback has been shaping Yaak since its launch in January 2024.

2025.9.01Password, NTLM Auth, and Better Git Compatibility
2025.8.0Sidebar Filtering, Environment Ordering, and Better Postman Imports
2025.7.0Superpowered Sidebar, AWS Auth, and Postman Environment Import
2025.6.0Folder Variables, Keychain Function, and Layout Toggle
2025.5.0Plugin Directory, GraphQL Doc Explorer, and Run Button
2025.4.0Environment Colors, Custom Fonts, and Colored HTTP Methods
2025.3.0Folder Inheritance, and More Template Functions
2025.2.0Encrypted Text, Sharable Environments, and Nested Functions
View Roadmap

Still not convinced?

Import an existing Postman, Insomnia, or OpenAPI collection and get started instantly.

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98k