Network Tools, Instantly.
101+ free browser-based network tools for DNS, IP, and connectivity diagnostics. No signup, no uploads, 100% private.
101+ free browser-based network tools for DNS, IP, and connectivity diagnostics. No signup, no uploads, 100% private.
Find the right converter for your needs
DNS lookup, WHOIS, and domain analysis tools
IP lookup, geolocation, and subnet calculators
SSL checker, header analysis, and security tools
Speed test, ping, and latency tools
IP, MAC, binary, and network format converters
Port scanner, traceroute, and network utilities
Most-used tools by our community
Free online asn lookup tool.
Free online bandwidth calculator tool.
Free online base64 encoder tool.
Free online base64 image tool.
Free online base64 url encoder tool.
Free online certificate decoder tool.
Free online cidr calculator tool.
Free online cidr to range tool.
Free online cname flattening tool.
Built for network engineers, sysadmins, and IT professionals
Every network tool runs entirely in your browser. No data is sent to any server. Your diagnostics stay completely private.
Enter your query and see results instantly. No waiting, no loading. All lookups happen in real-time.
Use any network tool as many times as you want. No account required, no daily limits. Every tool is free and unrestricted.
Responsive design that works on desktop, tablet, and phone. All tools are touch-friendly and optimized for every screen size.
How DNS works, record types, and troubleshooting common DNS issues.
Understanding SSL/TLS certificates: types, installation, and troubleshooting.
IPv4 vs IPv6, subnetting, CIDR notation, and IP address management.
Essential network security concepts: firewalls, ports, and common vulnerabilities.
NetTool (nettool1.com) is a free online tool suite offering 115+ free tools for data and file format conversion. All tools run entirely in your browser. No registration required.