How does ioFast.net test internet speed?

ioFast.net measures your network latency (ping), download speed, and upload speed by exchanging sample data payload with Cloudflare global edge servers closest to your location.

How can I check my public IP address?

Your public IPv4 or IPv6 address, along with ISP and geographic location info, is automatically detected and displayed on ioFast.net when you load the page.

What is a good internet download and upload speed?

A download speed of 25 Mbps or higher is ideal for 4K video streaming and general browsing. For online gaming and video calls, low latency (ping 10 Mbps) are recommended.

Internet Speed Test & IP Check — Fast, Free & Accurate

Your IP Address

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Start

Download, upload & latency measured via Cloudflare's global network.

Download

— Mbps

Upload

— Mbps

Ping

— ms

ISP —

Location —

Server Cloudflare CDN

Status Ready

Records for IP: —

Date / Time	ISP	Download	Upload	Ping
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Fast & Accurate Broadband & Mobile Speed Test

ioFast.net is a free, web-based tool designed to measure your internet connection's real-world performance. By leveraging Cloudflare's high-speed edge network across hundreds of cities worldwide, ioFast.net delivers precise download speed, upload speed, latency (ping), and public IP lookup results without requiring any app installation or user signup.

How is Internet Speed Measured?

Speed tests measure your bandwidth by transferring data between your browser and the nearest server node. Download speed reflects how fast your connection receives data, upload speed measures how fast it sends data, and ping represents latency (delay) in milliseconds.

What Is My Public IP Address?

Your public IP address is the unique numerical identifier assigned to your internet router or device by your Internet Service Provider (ISP). It allows servers on the web to route requested web content and data packets directly to you.

Why Is My Ping or Speed Different From My Plan?

Actual speeds can be influenced by local Wi-Fi interference, router hardware, background applications, peak network traffic hours, and ISP routing paths. Using an Ethernet cable and pausing active downloads ensures the most accurate test results.