Free Tools
IT Tools, Built for IT Professionals
Practical, no-signup tools to help you plan, calculate and make smarter IT decisions — built by the Decoding IT team.
Networking
IP Subnet Calculator
Calculate subnet masks, network addresses, broadcast addresses and usable host ranges for any CIDR block instantly.
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Microsoft 365
M365 License Cost Estimator
Compare Microsoft 365 plans and estimate total monthly and annual licensing costs across your entire user base.
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Business Continuity
Downtime Cost Calculator
Quantify the real financial impact of IT downtime — factor in lost revenue, staff productivity and recovery costs.
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Backup & Recovery
Backup Storage Calculator
Estimate your backup storage needs based on data size, retention period, daily change rate and compression ratio.
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Coming Soon
More tools on the way
We're building more free tools for IT teams. Check back soon — or let us know what you need.