CardonX
The Offline HTTP Client
Organize your API requests in collections and workspaces. Free, offline, no accounts required.
Everything You Need
A complete HTTP client built for developers who value privacy and simplicity.
Collections & Workspaces
Organize your API requests into hierarchical collections and separate workspaces for different projects.
Environments
Manage variables per environment — dev, staging, production — and switch between them instantly.
Fully Offline
All your data stays on your machine. No cloud sync, no telemetry, no external servers involved.
Multi-Platform
Same clean experience on iOS, Android, macOS, Linux, and Windows. Built for every platform you use.
Cloud Sync Coming Soon
Sync your collections, environments, and settings across all your devices. Available with a premium subscription in the future.
Light & Dark Mode
Material 3 design with both light and dark themes. Choose what suits your workflow.
How It Works
Get started in seconds. No setup, no sign-up.
Create Collections
Organize your API requests into collections and workspaces. Group related endpoints together just like you do in Postman.
Set Up Environments
Define variables for each environment — dev, staging, production. Switch with one tap and all your requests update.
Send & Inspect
Send requests and inspect responses with a clean three-panel layout. Headers, body, status — everything at a glance.
Download CardonX
Available on all major platforms. No email required. Just download and use.