Internet Speed Test
Test your download speed, upload speed, and ping latency directly in your browser — no app required.
Press Start Test to measure your internet speed.
Results are browser-estimated and may vary based on network congestion, Wi-Fi signal, server distance, and device hardware. For ISP troubleshooting also check your provider's official speed test tool.
How to Use Internet Speed Test
Keep this tab active and avoid switching away while the test runs — about 15 seconds total.
Multiple small requests are timed to calculate your round-trip latency in milliseconds.
A 5 MB test file is fetched from Cloudflare's global CDN and the transfer rate is measured.
A 1 MB payload is sent to a test endpoint and the upload throughput is calculated.
25+ Mbps download = good for HD streaming. 100+ Mbps = excellent for multi-device households. Under 20 ms ping = ideal for gaming.
Features & Benefits
Download Speed
Measures how fast your device receives data — affects streaming, browsing, and file downloads.
Upload Speed
Measures how fast your device sends data — critical for video calls, cloud backups, and live streaming.
Ping / Latency
Round-trip time in milliseconds. Lower is better — under 20 ms is excellent for real-time applications.
No App Needed
Runs entirely in your browser using Web Fetch API. No installation, account, or personal data stored.
About Internet Speed Test
What Does an Internet Speed Test Measure?
An internet speed test measures three key metrics: download speed (how fast data travels from the internet to your device), upload speed (how fast your device sends data to the internet), and ping (the round-trip latency in milliseconds). Together these determine your internet connection quality for different tasks.
Understanding Download Speed
Download speed is measured in Megabits per second (Mbps). It determines how quickly you can stream videos, load web pages, and download files. For reference: 5–10 Mbps supports standard HD streaming; 25 Mbps handles 4K streaming on one device; 100+ Mbps suits a family with multiple simultaneous streams and gaming.
Understanding Upload Speed
Upload speed determines how fast you can send data — critical for video calls, uploading files to cloud storage, sending large email attachments, and live streaming. Most residential internet plans have asymmetric speeds: upload is typically 5–20x slower than download. Symmetric connections (equal upload and download) are common with fiber.
Understanding Ping and Latency
Ping measures the round-trip time for a small packet of data to travel from your device to a server and back. It is measured in milliseconds (ms). Lower ping = more responsive connection. Under 20 ms is excellent (ideal for gaming). 20–50 ms is good. 50–100 ms is acceptable. Above 150 ms you may notice lag in video calls and online games.
Why Your Speed May Differ From Your Plan
- Wi-Fi interference — walls, distance from router, competing devices
- Network congestion — peak usage hours at your ISP
- Router age — older routers bottleneck faster connections
- Shared bandwidth — multiple devices using your connection simultaneously
Frequently Asked Questions
Download: 25 Mbps supports HD streaming. 100 Mbps suits 4–6 devices. 500+ Mbps is excellent for large households with 4K and gaming. Upload: 10 Mbps handles video calls well. Ping: Under 20 ms is excellent; 20–50 ms is good; above 100 ms you may notice lag in games and calls.
Several factors reduce effective speed: Wi-Fi signal strength, shared ISP bandwidth during peak hours, physical distance from test servers, other devices on your network, and browser/device overhead. For your plan's true speed, connect via ethernet directly to the modem and test at off-peak hours.
Browser-based tests provide useful estimates but are limited by browser security restrictions and HTTP overhead. For official ISP troubleshooting, use your provider's dedicated tool (e.g., Xfinity Speed Test, AT&T Speed Test). This tool is best for quick checks and trend monitoring.
Common causes: physical distance from the server, network congestion during peak hours, Wi-Fi interference, background downloads consuming bandwidth, and ISP routing issues. Testing at different times of day helps identify if congestion is the cause.
Each test uses approximately 6 MB of data — 5 MB for download, 1 MB for upload, plus small ping requests. If you are on a metered or mobile connection, keep this in mind before running repeated tests.