About
About ioFast.net
Welcome to ioFast.net — your fast, free, and independent tool for checking your real internet performance. No sign-up, no tracking, no fluff.
Why people use it
Whether you are troubleshooting buffering, validating a new router, or checking whether your provider is delivering the speeds you pay for, ioFast.net gives you a clear snapshot in seconds.
What we measure
With a single click, our lightweight test analyzes your public IP address and reports your download speed, upload speed, and ping latency — powered by Cloudflare's global edge network for consistent, real-world results.
What we value
- Zero bloat: a clean experience with instant results — no installation needed.
- Accurate data: tests run against optimized Cloudflare infrastructure for real-world insight.
- Privacy-conscious: we process only the minimum data needed to run and display your test.
How it works
ioFast.net uses browser-native fetch()
and XMLHttpRequest APIs to stream data
to and from Cloudflare endpoints, measuring throughput in 200 ms windows and reporting
the 75th-percentile sustained speed — the same methodology used by fast.com.