About CheckMySpeed
CheckMySpeed.org is a free, open-source internet speed testing tool designed to give you accurate insights into your connection performance without compromising your privacy.
Our Mission
We believe that everyone deserves access to reliable tools for measuring their internet connection. Our mission is to provide a fast, accurate, and privacy-respecting speed test that works directly in your browser without any downloads, plugins, or data collection.
How It Works
Our speed test uses a sophisticated client-side approach to measure your connection:
- Latency (Ping): We measure round-trip time to multiple endpoints to determine your connection's responsiveness.
- Download Speed: Real files are downloaded from public CDNs to accurately measure your download bandwidth.
- Upload Speed: Based on connection characteristics and download performance, we estimate your upload capacity.
100% Client-Side: All tests run entirely in your browser. No data is sent to our servers, and no information about your connection or location is stored.
Why Choose CheckMySpeed?
- Privacy First: No tracking, no cookies, no data collection
- Open Source: Transparent code that anyone can review
- No Registration: Use it instantly without creating an account
- Modern Design: Built with the latest web technologies
- Fast & Accurate: Optimized algorithms for reliable results
- Cross-Platform: Works on any device with a modern browser
Technical Details
CheckMySpeed leverages the Fetch API to download test files from globally distributed CDNs. By measuring the time taken to download files of known sizes, we calculate your actual bandwidth. The test automatically adjusts to your connection speed by using progressively larger files for more accurate measurements.
For latency testing, we ping multiple endpoints and use the best result to give you the most accurate representation of your connection's responsiveness.
Accuracy & Limitations
While we strive for accuracy, several factors can affect speed test results:
- Network congestion and peak usage times
- Distance to test servers and CDN edge locations
- Background applications using bandwidth
- WiFi signal strength and interference
- Browser performance and system resources
For best results, we recommend closing bandwidth-intensive applications and running multiple tests at different times of day.
Open Source
CheckMySpeed.org is built with transparency in mind. Our code is open for anyone to inspect, learn from, and contribute to. We believe in the power of community-driven development and welcome feedback from users and developers alike.