Boomerang

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BoomerangLightning-fast API Testing

The browser-based companion for API testing that launches instantly and packs all the features you need. No bloat, no hassle, just what you need to get your testing done.

Get Started
Quick Start Guide
Chrome Web Store
Edge Add-ons
⚡

Lightning Fast

At just 500KB zipped, Boomerang launches instantly in your browser. No heavy installations or slow startup times.

🌐

Browser-Based

Works directly in your browser as an extension or PWA. No desktop app needed - just install and start testing.

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REST & SOAP Support

Test both REST and SOAP APIs with ease. Import from WSDL or OpenAPI/Swagger definitions.

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Collection Runner

Run your requests in sequence with the Collection Runner. Perfect for testing complex workflows and data-driven tests.

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Environment Management

Switch between environments easily (dev, staging, prod) with environment variables and global settings.

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Scripting Power

Write pre-request scripts and validate responses with full JavaScript support and built-in assertion libraries.

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Privacy First

Your data stays on your machine. No cloud storage, no signups required - just pure API testing.

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Import & Export

Import from Postman collections, WSDL files, or OpenAPI specs. Export your projects to share with your team.

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Developer Focused

Built for developers, by developers. Clean interface with all the features you need, nothing you don't.

Why Choose Boomerang? ​

Boomerang was built to solve the pain points of traditional API testing tools. We believe API testing should be:

  • Fast - No waiting for heavy applications to load
  • Simple - Clean interface that gets out of your way
  • Powerful - All the features you need without the bloat
  • Private - Your data stays on your machine

Perfect For... ​

RoleUse Case
👩‍💻 DevelopersQuick API testing during development
🔍 QA EngineersComprehensive testing workflows with Collection Runner
🛠️ Integration SpecialistsSOAP and REST API testing with import capabilities
🎓 Students & LearnersEasy-to-use interface for learning API concepts
🚀 Anyone Needing Quick API TestsLightweight tool that's always ready when you need it

Getting Started ​

Installation Options ​

1. Visit [Chrome Web Store](https://chromewebstore.google.com/detail/boomerang-soap-rest-clien/eipdnjedkpcnlmmdfdkgfpljanehloah)
2. Click "Add to Chrome"
3. Find Boomerang in your toolbar
4. Start testing immediately
1. Visit [Microsoft Edge Add-ons](https://microsoftedge.microsoft.com/addons/detail/boomerang-soap-rest-c/bhmdjpobkcdcompmlhiigoidknlgghfo)
2. Click "Get"
3. Look for Boomerang in toolbar
4. Begin API testing
1. Go to app.boomerangapi.com
2. Install as PWA
3. Use with browser extension for CORS bypass

Your First Request ​

  1. Open Boomerang - Click the extension icon
  2. Enter URL - Try https://jsonplaceholder.typicode.com/posts/1
  3. Click Send - See your response instantly
  4. Explore Features - Add headers, params, and more

Pro Tip

Your data is stored locally, so remember to export your important projects from time to time!

What Developers Say ​

TIP

"Been using it for years. Lightweight and simple, great for working with REST APIs."

TIP

"The best part is the performance and simplicity."

TIP

"Absolutely indispensable. Very fast and flexible for all my API testing needs."

Ready to Dive Deeper? ​

GuideDescription
📚 Core ConceptsUnderstand projects, services, collections, and variables
🚀 Quick Start GuideGet up and running in minutes
🔄 REST API TestingMaster REST API testing workflows
📡 SOAP API TestingLearn SOAP service testing with WSDL import
📝 Scripts GuideAutomate your testing with JavaScript
🏃‍♂️ Collection RunnerRun sequences of requests and automate workflows
🌍 Variables GuideMaster environment variables and data sharing

Join the Community

Join thousands of developers who use Boomerang daily for their API testing! 🎉

Boomerang - Lightning-fast API testing tool