These are working tools, not lead-capture forms. Each one runs entirely in your browser: nothing you type is sent to a server, stored, or logged. There is no sign-up, and there is nothing to download.
VPC and subnet planner
Divide a VPC CIDR across availability zones and subnet tiers. It reports the real usable host count per subnet — the total minus the five addresses AWS reserves in every subnet — and flags misaligned blocks, non-private ranges and allocations that overflow the VPC. Open the planner.
Recovery strategy selector
Map your recovery time and recovery point objectives onto the four documented AWS disaster-recovery patterns, and see what each one actually commits you to operationally — including what it does not protect against. Open the selector.
Migration readiness check
A structured pre-migration review across landing zone, networking, identity, data and operations. Blocker items are marked separately from the rest, because the distinction is what decides whether a cutover date is realistic. Open the checklist.