Clear by default
Every screen explains what it needs and keeps technical detail close to the result.
About the project
Practical utilities for network engineers.
Network Engineer Toolbox brings common calculations, diagnostics, and references into one focused workspace. It is made for everyday use: clear inputs, readable results, and enough context to understand what the output means.
The engineering logic remains detailed. The interface stays calm, direct, and easy to navigate.
Useful in context
Tools cover common network, DNS, email, reference, and cryptography workflows.
Private where it matters
Calculations, encoding, hashing, and cryptographic operations run in the browser. DNS checks use DNS-over-HTTPS.
What is included
22 tools across five categories.
IP & Subnet
Address planning, masks, ranges, and wildcard math.
DNS
Live DNS-over-HTTPS record inspection and reverse lookup.
SPF, DKIM, DMARC, and mail-path diagnostics.
Network
Ports, VLANs, CIDR, IP, and HTTP quick references.
Utilities
Encoding, cryptography, hashes, and structured-data utilities.
Ready when the next network question shows up.
Start with the subnet calculator, or search the full directory.