The IT cheat sheet for IT professionals and the service desk

Essential Windows, networking and admin commands, subnets, ports, event IDs, service status and clean installers in one free cheat sheet. No account needed.

More free IT tools

Windows and Microsoft 365

Commands: PowerShell, CMD and Bash side by side
Exchange builder: Permissions, forwarding, mailboxes
Entra and Intune commands: Graph PowerShell for users and devices
Error code lookup: Windows, Office and Intune codes
Event ID lookup: What an event means and where to look
Keyboard shortcuts: Windows, Outlook, Teams and run commands

Utilities

Password generator: Temporary passwords and passphrases
File hash checker: Compare SHA-256 against the vendor's
Encode and decode: Base64, URL and JWT
Time zone converter: Schedule a change window across offices

Networking

RJ45 pinouts: T568A and B, crossover, rollover
Subnet calculator: Size by device count or address
Port reference: Common ports with test commands
DNS lookup: A, MX, TXT, SPF and DMARC records
MAC vendor lookup: Find who made a device on the network
IPv6 calculator: Prefixes, ranges and shorthand

Software and news

Clean downloads: Enterprise installers and winget scripts
Admin portals: Microsoft, AWS, Google, Okta, Zoom and more
Service status: Is Microsoft 365, Zoom, Claude or OpenAI down?
Daily IT news: Security, advisories and IT headlines