Speed Test
Test internet speed with Ping, Download, Upload, and Jitter tests.
Run Speed TestFree Online Network Tools
Test your internet speed, check whether a website is down, and look up your IP address and DNS. 100% free, no registration required.
Is It Down?
Check if a website is up and how fast it answers, with a DNS check.
Check a WebsiteIP Address Tool
Get your public IP, geolocation, and ISP details. Handy for network troubleshooting.
Check Your IPDNS Resolver
Find DNS records for any domain. Check TTL, NS, and A records instantly.
Try DNS CheckerFrom the blog
All articlesShort, practical guides to the network basics behind our tools.
Troubleshooting slow internet at home: a step-by-step checklist
Slow internet has many possible causes, from a crowded Wi-Fi channel to a failing resolver. Work through this checklist in order and you will usually find the culprit, or at least have solid evidence for your provider.
Read articleHow to read speed test results: download, upload, ping and jitter
A speed test gives you four numbers in a few seconds. Here is what each one measures, which ones matter for what you do online, and why two tests a minute apart rarely agree.
Read articlePublic vs private IP addresses, IPv4 vs IPv6, and what an IP lookup reveals
Your devices have more than one IP address, and only one of them is visible to the websites you visit. A clear explanation of public and private addresses, IPv4 and IPv6, and what an IP lookup actually shows.
Read article