ZeroKit

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How to Test Internet Speed

The Speed Test estimates your download speed by measuring how fast your browser can fetch a test payload.

  1. Click Start to begin the speed test.
  2. Wait while the tool downloads a test file and measures throughput.
  3. View your estimated download speed in Mbps.

How Speed Tests Work

A speed test downloads a known-size payload and measures the time taken. Speed = FileSize / Time. Multiple samples may be taken and averaged. Results depend on many factors: your ISP, network congestion, Wi-Fi quality, server distance, and browser performance. For the most accurate results, use a wired connection and close other bandwidth-consuming applications.

Why Use Our Speed Test?

  • One-click test — start with a single button press.
  • No app required — runs directly in your browser.
  • Lightweight — no heavy test infrastructure needed.
  • Private — no personal data is collected.

Frequently Asked Questions

Why is my speed different from other speed tests?

Results vary based on server location, test methodology, and network conditions at the time of testing. For the most reliable result, test multiple times and compare.

Does it test upload speed?

Currently the tool focuses on download speed. Upload speed testing may be added in the future.

Why is my speed slower than what I pay for?

ISP speeds are 'up to' maximums. Actual speeds depend on network congestion, Wi-Fi interference, distance from router, and the number of connected devices.

Is any data collected?

No personal data is collected. The test measures download speed only.