Free tools
Free Internet Tools
Test your connection, calculate download times and look up IP addresses and DNS records. Simple, fast and free, with no sign-up.
Available tools
Internet Speed Test
Measure your download speed, upload speed, ping and jitter in about half a minute.
Open tool →Download Time Calculator
Enter a file size and your speed to see how long a download or upload will take.
Open tool →IP Lookup
See your public IP address and connection details, or look up any IP address.
Open tool →DNS Lookup
Check the A, AAAA, MX, NS, TXT, CNAME, SOA and CAA records of any domain.
Open tool →Why use InternetSpeedTest.tools
Free to use
Every tool is free. There is nothing to install and no account to create.
Fast and simple
Each tool does one job and shows a clear result, with plain-language explanations next to it.
Works on any device
Use the tools on a phone, tablet or computer, in any modern web browser.
Clear explanations
Each tool page explains what the result means, so you can act on it and not just read a number.
A short guide to your internet connection
Your internet connection is more than one number. Three measurements describe how it feels in daily use: download speed, upload speed and latency.
- Download speed is how fast data reaches your device. It matters for streaming, browsing and downloading files.
- Upload speed is how fast your device sends data out. It matters for video calls, cloud backups and sharing large files.
- Ping (latency) is the time a small message takes to travel to a server and back. Low ping matters most for gaming and live calls.
- Jitter is how much the ping changes from one moment to the next. High jitter can make calls and games feel unstable.
Use the table below as a rough guide to the speed that different activities need. Remember that several people or devices using the connection at the same time share the total speed.
| Activity | Typical speed needed |
|---|---|
| Email and web browsing | 1 - 5 Mbps |
| Video calls | 3 - 10 Mbps |
| HD video streaming | 5 - 10 Mbps |
| Online gaming | 10 - 25 Mbps, with low ping |
| 4K video streaming | 15 - 25 Mbps |
| Busy household with many devices | 100 Mbps or more |
How the tools work together
Start with the Internet Speed Test to see what your connection delivers right now. Then use the Download Time Calculator to turn that speed into a real estimate for a game, a movie or a backup.
If a website or email address is not working, the DNS Lookup shows whether the domain's records are set up correctly, and the IP Lookup shows where an IP address is located and which network it belongs to.
Frequently asked questions
Are these internet tools really free?
Yes. All tools on this site are free to use, and you do not need to register or install anything.
How accurate is the internet speed test?
The test measures the speed between your device and our server at the moment you run it. Results can vary with Wi-Fi signal, other devices on your network, the time of day and the browser you use. For the most reliable result, close other apps and use a wired connection if you can.
Which tool should I use if my website or email is not working?
Start with the DNS Lookup. It shows whether the A, CNAME, MX and TXT records of your domain point to the right place. Then use the IP Lookup to check where an IP address is located and who runs it.
How do I work out how long a download will take?
Run the Internet Speed Test to find your download speed, then enter that speed and the file size in the Download Time Calculator. It gives the estimate in hours, minutes and seconds.
Why is my internet slower than the speed my provider advertises?
Advertised speeds are usually the maximum under ideal conditions. Wi-Fi interference, an old router, network congestion in the evening and the limits of the server you connect to can all lower the speed you see.
Do you plan to add more tools?
Yes. We are building a growing library of internet and network tools. Check this page regularly for new additions.
About this site
InternetSpeedTest.tools provides free, easy-to-use tools to help people understand and troubleshoot their internet connection. Learn more about us, or read our Privacy Policy and Terms and Conditions.