Free browser-based tools for network diagnostics, IP intelligence and DNS inspection. No installs, no accounts – just results. Built for engineers, sysadmins and IT professionals.
Ping Test
Test connectivity and round-trip latency to any host or IP address.
IP Lookup
Look up the location, ISP, ASN and organisation info for any IP address.
DNS Lookup
Query DNS records – A, AAAA, MX, TXT, CNAME and more for any domain.
Port Checker
Check whether a specific TCP port is open or closed on a remote host.
Traceroute
Trace the network path to a destination and identify bottlenecks or failures.
Subnet Calculator
Calculate network address, broadcast, host range and CIDR notation.
Reverse DNS
Resolve an IP address back to its associated hostname via PTR record.
Speed Test
Test your internet connection download, upload and ping performance.
Ping Test
A ping test measures the round-trip time (RTT) between your browser and a target host. This browser-based tool uses fetch() timing to approximate latency – useful for quick connectivity checks and identifying high-latency connections on 4G/5G or satellite links. Open Ping Test
IP Lookup Tool
Enter any IPv4 or IPv6 address to retrieve geolocation, ISP, ASN (Autonomous System Number), organisation, country, region, city and timezone data. Useful for verifying VPN exit nodes, tracing traffic sources, or auditing server configurations. Open IP Lookup
DNS Lookup
Query DNS records for any domain – including A, AAAA, MX, TXT, CNAME, NS and PTR records – using Cloudflare’s DNS over HTTPS (DoH) resolver. Useful for verifying DNS propagation, diagnosing mail delivery issues, or checking SPF/DKIM records. Open DNS Lookup
Port Checker
Check whether a specific TCP port is open or closed on a remote host. Useful for diagnosing firewall rules, verifying that services are listening on expected ports, or confirming remote access is correctly configured. Open Port Checker
Traceroute
Traceroute maps the network path between your location and a destination, showing each hop and the latency at each point. True browser-based traceroute is not possible due to ICMP/TTL restrictions in browser sandboxes. Use your OS command line or the PingReboot desktop tool for a full traceroute. View Options
Subnet Calculator
Enter a CIDR notation address (e.g. 192.168.1.0/24) to calculate the network address, subnet mask, wildcard mask, broadcast address, first and last usable host, and total number of hosts. Essential for IP planning and network segmentation. Open Subnet Calculator
Reverse DNS Lookup
Reverse DNS (rDNS) resolves an IP address back to its associated hostname via the PTR record. Commonly used to verify mail server configurations, identify device owners, or validate that a server’s forward and reverse DNS records match. Open Reverse DNS
Speed Test
Test your internet connection’s download speed, upload speed and latency using real file transfers via Cloudflare edge endpoints. Useful for benchmarking 4G/5G routers, SIM cards and fixed-line connections. Open Speed Test