Have you ever sent an API request and got a response that made no sense?
- ❌ Status codes you didn’t expect.
- ❌ Empty responses.
- ❌ JSON that looks correct—but behaves wrong.
And then you ask yourself:
"Is the API broken… or is it my request?"
This is one of the most common frustrations developers face every day.
🚫 The Real Problem With Testing APIs
When working with APIs, small mistakes cause big problems:
- Missing headers
- Incorrect HTTP methods
- Wrong body format
- Broken authentication
- Invalid GraphQL queries
Many developers jump between Terminal commands, Browser tools, and Heavy desktop apps.
Which raises an important question:
Why should testing an API feel harder than building it?
⚡ A Simpler Way to Test APIs (REST + GraphQL)
To solve this, I built a fast, browser-based API Tester on HarisLab.tech.
- No installation.
- No signup.
- No bloated interface.
Just open the page and start testing.
✅ What This API Tester Solves
- Test REST APIs (GET, POST, PUT, DELETE)
- Send custom headers and authorization tokens
- Inspect JSON responses instantly
- Test GraphQL queries without extra tools
- Debug APIs faster
Everything runs directly in the browser, making it Fast, Simple, and Beginner-friendly.
🌐 Why Browser-Based Matters
Most API testers are heavy desktop applications. But ask yourself:
Why install a 300MB app just to test one endpoint?
With a browser-based tester:
- You can test APIs anywhere.
- You can share endpoints easily.
- You can debug faster.
And for quick testing, this is often all you need.
🔄 REST and GraphQL in One Place
Modern applications don’t use just one API style. Some endpoints are REST. Others are GraphQL. Switching tools breaks focus.
This API Tester supports both—so you stay in one workflow.
🛠️ A Real Developer Scenario
You’re integrating a third-party API. The documentation says:
- "Send this header"
- "Use this query"
- "Expect this response"
But something doesn’t work. Instead of guessing, you test it live.
- You see the response.
- You fix the issue.
- Problem solved in minutes — not hours.
👨💻 Who Is This Tool For?
- Frontend developers
- Backend developers
- Mobile developers
- Students learning APIs
- Anyone debugging HTTP requests
If you work with APIs, this tool saves time.
🔹 Part of HarisLab.tech
The API Tester is part of HarisLab.tech, a growing platform of free developer tools focused on:
- Speed
- Simplicity
- Privacy
- Client-side processing
Built for developers who want tools that just work.
🚀 Try It Yourself
Next time an API behaves strangely, don’t guess. Test it.
Go to API Tester →
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