Speed-Test by OpenSpeedTest™
Free, open-source HTML5 network speed test tool. No plugins needed, runs on any modern browser. Lightweight (<8kB gzip), secure (static files only), and can be self-hosted.
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Pure frontend speed test tool, open-source, lightweight, privacy-focused, self-hostable.
Core Features
- Pure frontend: static files only, no backend required, easy to deploy
- Ultra-lightweight: gzipped script under 8kB, fast loading
- Cross-device: works on IE10+ and all modern browsers
- Secure by design: no hidden exploits or tracking
- Stress test mode: continuous speed test with configurable duration
What It Can't Do
- •When self-hosting, configure Nginx to allow POST body size of at least 35MB and timeout over 60 seconds, otherwise tests will fail. Disable access logs for best performance. If behind a reverse proxy, adjust body size limits accordingly.
Use Cases
- IT administrators deploy an internal speed test server to monitor bandwidth
- Home users quickly test Wi-Fi or broadband speed without installing software
- Developers set up a local test environment to verify network performance
Detailed Introduction
SpeedTest by OpenSpeedTest™ is a free and open-source HTML5 network performance estimation tool written in pure Vanilla JavaScript, using only built-in Web APIs (XHR, HTML, CSS, JS, SVG). No third-party frameworks or libraries are required. It can run on any web browser IE10 or newer, making it accessible from any device. The tool is designed to be lightweight (script size under 8kB gzip) and secure by design—only static files, no server-side code or hidden exploits. Users can either self-host on any static web server (e.g., Nginx, Apache, IIS) or use the official OpenSpeedTest-Server apps available for Windows, Mac, Linux, Android, iOS, and Docker. Features include stress testing (continuous speed test) with configurable durations, support for HTTP/1.1, HTTP/2, HTTP/3, and SVG-based UI that adapts to any display size. Compared to proprietary tools like Ookla Speedtest, OpenSpeedTest offers full transparency, privacy (no tracking), and the ability to run entirely on your own infrastructure.
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Getting Started
Download installer
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Install the software
Double-click the downloaded installer and follow the prompts
Step 1: Download OpenSpeedTest-Server app (Windows/Mac/Linux) or clone the source
Step 2: If self-hosting, place files in a static server directory (e.g., Nginx), ensure POST body limit >35MB and timeout >60s
Step 3: Start the server and visit the IP/domain in a browser to begin testing
- Step 1: Download OpenSpeedTest-Server app (Windows/Mac/Linux) or clone the source
- Step 2: If self-hosting, place files in a static server directory (e.g., Nginx), ensure POST body limit >35MB and timeout >60s
- Step 3: Start the server and visit the IP/domain in a browser to begin testing
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Open Source Transparency
View GitHub SourceUninstall Info
If using the official app, uninstall it normally. If self-hosted, simply delete the directory; no system files remain.
No Extra Dependencies
Ready to use after download. No additional runtime required.
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