Free Internet & Network Tools
Speed, ping, IP, DNS, router, website and subnet tools in one place. Every tool runs in your browser or on our servers with no sign-up.
What do you want to do?
Speed & latency
Measure your connection's throughput, latency and stability.
- Internet speed testMeasure download, upload, ping, jitter and latency under load.
- Ping & jitter testMeasure latency, jitter and timeouts from your connection over 30 seconds.
- Wi-Fi speed testTest your wireless connection and find out whether Wi-Fi is the bottleneck.
- Mobile speed testTest 4G and 5G mobile data from your phone.
- Broadband speed testCheck whether your fixed-line plan delivers the speed you pay for.
- Network troubleshooterRun automatic checks and get step-by-step advice for a slow or broken connection.
- Test historyYour saved speed test results and charts, stored in this browser.
IP address tools
Find and inspect public IP addresses, ISPs and IPv6 support.
- What is my IPSee your public IPv4 and IPv6 address, ISP and approximate network location.
- IP lookupLook up who owns any IP address, its network range, country and reverse DNS.
- ISP finderFind out which internet provider and network (ASN) your connection or any IP belongs to.
- IPv6 testCheck whether your connection works over IPv4, IPv6 or both.
- Public vs private IP checkerCheck whether an IP address is public, private, CGNAT, loopback or reserved.
- Reverse DNS lookupFind the hostname (PTR record) assigned to an IP address.
Router tools
Open your router's admin page and identify devices on your network.
DNS & domain tools
Query DNS records, check propagation and look up domain ownership.
- DNS lookupLook up A, AAAA, MX, NS, TXT, CNAME and SOA records for a domain.
- DNS propagation checkerCompare DNS answers from 10 public resolvers to see whether a change has propagated.
- Domain to IP lookupFind the IPv4 and IPv6 addresses a website or domain points to.
- Whois lookupSee a domain's registrar, registration and expiry dates and name servers.
- Subdomain finderDiscover common subdomains of a domain through DNS lookups.
Website & server tools
Check how a website or server responds from the internet.
- Website response timeMeasure DNS, connection, TLS and first-byte time for any website.
- HTTP header checkerInspect a URL's status code, redirect chain and response headers.
- SSL certificate checkerCheck a site's TLS certificate, issuer, expiry date and covered domains.
- Port checkerCheck whether a TCP port is open and reachable from the internet.
- Service status checkCheck whether popular services resolve in DNS right now.
Network calculators
Work out subnets, masks and CIDR ranges.
About these tools
Browser-based tools (speed test, ping test, Wi-Fi test) measure your own connection. Lookup tools (DNS, WHOIS, SSL, port and header checks) run on our server and show how a site or address looks from the internet, which is not the same as from your network. Each tool page explains what it measures and its limits.
Lookups are rate-limited to keep the service fair, and we don't store the domains or addresses you check. See privacy and methodology.