OpenSpeedTest

OpenSpeedTest is a free and open-source HTML5 network performance estimation tool that runs entirely in the web browser. It measures connection quality (including download, upload, ping, and jitter) and can be hosted on your own infrastructure as static files.

Key Features

• Browser-based testing with no client app or plugins required
• Measures download speed, upload speed, ping/latency, and jitter
• Static deployment model (HTML/CSS/JS/SVG) designed to run on common web servers
• Supports optional automation via URL parameters (auto-run, stress/continuous testing, and per-test selection)
• Multi-server configuration support with automatic low-latency server selection
• Configurable parallel connections and test parameters for tuning accuracy and load

Use Cases

• Validate ISP performance and troubleshoot latency/jitter issues
• Run LAN/WAN speed tests for offices, labs, and homelabs without relying on third-party services
• Perform stress tests to observe network behavior under sustained load

Limitations and Considerations

• Results are browser-based and can vary due to device performance, browser behavior, and network conditions
• Achieving accurate high-speed results depends on server performance, TTFB, and correct web server/proxy configuration

OpenSpeedTest is a lightweight option for organizations and individuals who want a simple, fast speed test they can run from any device. Its static architecture and configuration flexibility make it practical for both quick checks and repeatable network testing workflows.