TechnicalEntropy

Public technical tools

Useful tools for
unruly systems.

Practical networking and infrastructure tools, available to use without an account.

Open subnet planner Browse the tools
ADDRESS SPACE / 01READY
IP SPACE172.16.0.0/16
65,536 addresses
  1. Core networks3 × /24
  2. Service ranges2 × /26
  3. Edge segments2 × /27
SUGGESTED START172.16.0.0/24

Available now

Focused tools.
Local answers.

01 / Network planning

IPv4 subnet planner

Inspect any IPv4 network or turn a mixed list of requirements into a clean, largest-first VLSM plan.

  • Single-network CIDR details
  • Variable-length allocation planning
  • Copyable and exportable results
Launch the planner

02 / File integrity

Local checksum verifier

Verify large ISOs, installers, archives, and checksum manifests locally. File contents never leave your device.

  • MD5, SHA-1, and SHA-2
  • Large-file streaming and batch manifests
  • Compatible checksum exports
Open the verifier

Built for immediate use

Straight answers.
Useful output.

TechnicalEntropy publishes focused public tools for common technical problems. The subnet calculator is the first, with more practical utilities to follow.