Best Online Smart Home Planning Software (No Download)
For online smart home planning software, CinemaConfig leads our ranking: 18 free home-theater calculators including speaker layout, seating/riser and acoustics tools. CinemaConfig, NetPlan and Plexus Network Planner are compared in full below — each with its real free-tier limits, platforms, and export formats spelled out before you sign up.
12 tools ranked · free tiers & pricing last verified Jun 23, 2026
How they compare
Ordered by overall fit — free-tier value, output quality, platforms, and ease.
CinemaConfig
Truly free18 free home-theater calculators including speaker layout, seating/riser and acoustics tools.
NetPlan
Truly freeFree with no account needed to build; sign-in only to save plans to the cloud.
Plexus Network Planner
Truly freeFree and open-source; runs entirely in the browser or offline with no account or backend.
Smart Home Builder
Truly freeFree browser configurator that builds room-by-room device kits with compatibility checks.
Audio Advice Home Theater Designer
Free, with limitsFree patented 3D designer; saving designs and getting full measurements ties into Audio Advice product picks.
Dreamedia 3D Home Theater Design Tool
Free, with limitsFree in-browser 3D theater builder; final design nudges toward a Dreamedia expert consult.
Hamina Planner
Free, with limitsFree Lite tier is cross-vendor but caps you at 3 access points per design.
TheaterCalc
Free, with limits11 free home-theater calculators including a visual room layout planner; a paid Blueprint guide is upsold.
WiFi Heatmap
Free, with limitsFree for up to 5 APs on one floor with no signup, but PNG export is watermarked.
Omada Design Hub
Free, brand-lockedFree planner with AI auto-wall and auto-AP placement, but device library is TP-Link Omada gear.
Ring Security Builder
Free, brand-lockedFree self-serve quiz that recommends a Ring product layout, but limited to Ring's own catalog.
UniFi Design Center
Free, brand-lockedFully free, license-free browser tool but only places Ubiquiti UniFi APs, cameras and switches.
CinemaConfig
Truly free18 free home-theater calculators including speaker layout, seating/riser and acoustics tools.
NetPlan
Truly freeFree with no account needed to build; sign-in only to save plans to the cloud.
Plexus Network Planner
Truly freeFree and open-source; runs entirely in the browser or offline with no account or backend.
Smart Home Builder
Truly freeFree browser configurator that builds room-by-room device kits with compatibility checks.
Audio Advice Home Theater Designer
Free, with limitsFree patented 3D designer; saving designs and getting full measurements ties into Audio Advice product picks.
Dreamedia 3D Home Theater Design Tool
Free, with limitsFree in-browser 3D theater builder; final design nudges toward a Dreamedia expert consult.
Hamina Planner
Free, with limitsFree Lite tier is cross-vendor but caps you at 3 access points per design.
TheaterCalc
Free, with limits11 free home-theater calculators including a visual room layout planner; a paid Blueprint guide is upsold.
WiFi Heatmap
Free, with limitsFree for up to 5 APs on one floor with no signup, but PNG export is watermarked.
Omada Design Hub
Free, brand-lockedFree planner with AI auto-wall and auto-AP placement, but device library is TP-Link Omada gear.
Ring Security Builder
Free, brand-lockedFree self-serve quiz that recommends a Ring product layout, but limited to Ring's own catalog.
UniFi Design Center
Free, brand-lockedFully free, license-free browser tool but only places Ubiquiti UniFi APs, cameras and switches.
How we picked
Every pick here is chosen on real-world fit — free-tier value, platforms, 3D quality, and export options. Read the full method on our how we rate page.