1. Project Overview

EasyPostman

An open-source API debugging and load testing tool that closely replicates Postman and offers a simplified version of JMeter, optimized specifically for developers with a clean interface and powerful features.

EasyPostman aims to provide developers with a local API debugging experience comparable to Postman, while integrating simplified JMeter capabilities for batch requests and stress testing. Built with the Java Swing technology stack, the project supports cross-platform operation and works without an internet connection, protecting the privacy of your API data.

2. Open Source License

Licensed under Apache-2.0

3. Screenshots

️ Screenshot Preview

Screenshot Preview

Preview	Preview

4. Feature Overview

Development Philosophy

• Focus on Core Features
   - Simple yet powerful, feature-rich without unnecessary bloat
• Privacy First
   - Local storage, no cloud uploads, protecting developer privacy
• Performance First
   - Native Java application with fast startup and smooth performance

Functional characteristics

• Supports common HTTP methods (GET/POST/PUT/DELETE, etc.)
• Supports SSE (Server-Sent Events) and WebSocket protocols
• Multi-environment variable management for easy switching between testing environments
• Automatically saves request history for easy review and reuse
• Batch Requests and Stress Testing (Simplified JMeter) to Meet Multiple Scenarios, with Support for Reports, Result Trees, and Trend Chart Visualization
• Request Editor with Syntax Highlighting
• Multi-Language Support (Simplified Chinese and English; English support under development)
• Local Data Storage for Privacy and Security
• Supports Import and Export in Postman v2.1 and curl Formats
• Visualized Response Results with JSON/XML Support
• Supports Configuration of Request Parameters, Headers, Cookies, and More
• Supports File Uploads and Downloads
• Supports Request Scripts (Pre-request Script, Tests)
• Supports Request Chaining
• Supports Detailed Monitoring and Analysis of Network Request Events

5. Tech Stack

️ Technology Stack Selection

Core Technical Stack

• Java 17
  : Uses the latest LTS version to take advantage of modern Java features
• JavaSwing
  : Native desktop GUI framework with excellent cross-platform compatibility
• jlink & jpackage
  : Official packaging tool for generating native installation packages

UI Component Library

• FlatLaf
  : Modern UI themes with dark mode and high-resolution display support
• RSyntaxTextArea
  : Syntax-highlighting text editor supporting JSON/XML/JavaScript and more
• jIconFont-Swing
  : Vector icon font support
• SwingX
  : Extended Swing component library
• MigLayout
  : Powerful layout manager

Networking and Utility Libraries

• OkHttp
  : High-performance HTTP client
• Nashorn/GraalVM
  : JavaScript scripting engine support
• SLF4J + Logback
  : Logging framework