NetTools Pro
Professional tools for network engineers
Calculators and Tools
IP Calculator
Subnet calculations, masks, CIDR
VLSM Calculator
Variable-length subnet planning
IP Converter
Binary, Hex, Octal, IPv6
Bandwidth Calculator
Transfer time or bandwidth estimation
Password Generator
Secure passwords for network devices
CIDR Aggregator
Summarization (aggregation) of IP subnets
Number converter
Instant conversion between decimal, binary and hexadecimal systems
MAC Address Converter
Convert MAC addresses between different formats
dBm <-> mW Calculator
Signal power conversion
Port Numbers Reference
Full TCP/UDP port table (0-65535)
Internet Speed Test
Internet connection speed check
Configuration Generator
Network equipment configuration generator: Cisco, MikroTik, Huawei. Validation, templates, and export.
Firewall Rule Splitter
Subtract selected SRC-DST-SERVICE flows and generate minimal safe rules.
Vendor Commands
Articles
Quick access
All tools are always at hand. Bookmark the site for instant access.
Security
All calculations are performed locally in your browser. We do not collect or store your data.
Works everywhere
Responsive design. Use it on desktop, tablet or smartphone.