Free Internet Speed Test
Check your download, upload speed, latency, and jitter in seconds.
About
This free online internet speed test measures your network's download speed, upload speed, ping (latency), and jitter in real-time. It runs entirely in your web browser without requiring any apps, flash, or heavy installations. Highly optimized to be ultra-lightweight, it runs smoothly on any device—from high-end desktop PCs to very low-end mobile phones—without draining your mobile data.
Features
- Measures download speed, upload speed, latency (ping), and jitter
- Real-time graphical and text feedback during testing
- Smart data saving: automatically caps download/upload streams to prevent data waste
- Ultra-lightweight: zero external framework dependencies to maintain fast site speeds
- Works on all modern browsers and devices (mobile, tablet, PC)
- Secure and private: runs locally in the browser with no telemetry tracking
FAQ
How does this speed test work?
The test makes small, rapid requests to measure your ping and jitter, streams a cached public file to calculate download speed, and uploads a temporary block of dummy data to measure upload speed. It computes these based on standard network transmission rates.
Do I need to install any software or extension?
No. This tool is built entirely in vanilla HTML, CSS, and JavaScript. It runs directly in your browser without any plugins, Flash, or apps.
Is this speed test data-efficient?
Yes. Traditional speed tests can consume hundreds of megabytes of data. This tool is built with a smart early-termination feature that caps tests to under six seconds, making it highly friendly for limited or metered mobile connections.
What do Ping, Jitter, Download, and Upload mean?
Ping (latency) is the reaction time of your connection (lower is better). Jitter is the variance in ping times (lower is more stable). Download speed is how fast data streams to you, and Upload speed is how fast you can send data to others (both higher is better).
Why do speed test results vary?
Results can fluctuate due to network congestion, Wi-Fi interference, background device usage, server load, and the quality of your router. Testing at different times can help give a more accurate picture.