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Speed Test by OpenSpeedTest™

A self-hosted HTML5 network speed test tool that runs in any browser without plugins or Java.

About Speed Test by OpenSpeedTest™

Speed Test by OpenSpeedTest is a lightweight, self-hosted network performance testing tool built entirely with HTML5 and JavaScript. It runs directly in a browser with no Flash, Java, or client-side plugins required. You deploy it on your own server to measure upload and download speeds between that server and any client device.

The tool uses a single HTML file and a few assets, making deployment trivial on any web server. It supports concurrent multi-threaded downloads and uploads, real-time latency measurement, and jitter testing. The results are displayed as a clean speed gauge and detailed numeric readout. It works on Linux, Windows, macOS, and mobile browsers.

OpenSpeedTest is free and open source under the GPL-3.0 license. It is ideal for sysadmins who want to test internal network throughput or ISP performance without relying on third-party speed test services. The project is maintained by OpenSpeedTest GmbH and has been deployed on over 100,000 servers worldwide.
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Quick Facts

Pricing
Free
License
Open Source
Platform
Any Platform
Version
2.0.0
Developer
OpenSpeedTest GmbH