Free Server Rack and Cabinet Configurator Online
RackBuilder is a free rack configurator online for server racks and cabinets. Use it as a server rack configurator and server cabinet configurator to place devices by U, then review the elevation before install day.
Ready to configure a rack in the live designer?
What this rack configurator includes
The tool turns catalog gear into a visual elevation. You choose a rack height, add devices from the library, and see empty U while you work. That makes it a practical rack configurator online for closets, IDFs, and small rooms, not just a static sketch.
- Place servers, switches, patch panels, PDUs, and cable managers by U.
- Block library adds when the rack has no free U left for that device height.
- See catalog wattage labels where available while you place gear.
- Start without an account; guest work survives reload, and signed-in users get cloud sync for saved designs.
How to use a server rack configurator by U
Inventory each device height first, then pick a cabinet size with spare capacity. Group patch panels with the switches they feed, leave U for horizontal managers near dense switching, and keep heavier UPS or PDU gear lower in the stack.
Move that plan into the designer and place devices in order. New devices from the library are blocked when the rack has no free U for that height. For spacing rules, see U-space best practices. For a step-by-step closet workflow, read how to design a network rack.
Server cabinet configurator tips
Align patch panel ports with switch ports to shorten patch cords. Reserve vertical managers for trunk bundles. Confirm receptacle types and circuit capacity using nameplate or catalog wattage outside the layout itself. RackBuilder does not store chassis weights, so compare vendor weight totals to the rack load rating separately.
Choosing form factor matters as much as U math. Compare 2-post, 4-post, and wall-mount racks, then settle the elevation before install day. For related planning pages, see the server rack builder, rack planner, and network rack builder guides.
Free rack configurator vs saved designs
Configuring stays free. Guests can plan without signup, and work in the browser survives a reload. Sign in when you want cloud sync across devices. Free accounts can save up to three rack designs; Pro unlocks unlimited saved designs. Compare options on Pricing.
Frequently asked questions
What is a server rack configurator?
A server rack configurator is a browser tool for placing catalog devices into a virtual rack elevation by U height. RackBuilder lets you configure server racks and cabinets online so you can review the layout before install day.
How do I use this rack configurator online?
Pick a rack height, add devices from the catalog, and arrange them in the live elevation. Library adds are blocked when the rack has no free U left for that device height. Start without an account; guest work survives reload, and signed-in users get cloud sync.
Is this server cabinet configurator free?
Yes. You can use the rack configurator online without signup to place devices and plan the elevation. Free accounts can save up to three designs; Pro unlocks unlimited saved designs when you need more capacity.
What belongs in a server cabinet configurator layout?
Typical cabinets mix servers, switches, patch panels, PDUs, and cable managers. Place heavier gear lower, leave U for horizontal managers near dense switching, and reserve spare U for growth. Use catalog wattage labels where available to cross-check circuits outside the tool. RackBuilder does not store chassis weights, so compare vendor weight totals to the rack load rating separately.
Configure your rack layout next
Open the free designer and turn this plan into a live elevation.