Best Online Lighting Design Software (No Download)

Completely free with no account; upload a house photo, drag lights along the roofline and get a photorealistic nighttime preview.

Completely free with no signup; place smart lights/devices on a floor plan, see light-ambiance previews and export a PDF with a real-product shopping list.

Completely free web lumen-method calculator for a rectangular room; gives average illuminance and fixture spacing only, not full point-by-point analysis.

Free to start designing festive illumination on a project photo with multiple garland types and export to JPG/PNG; heavier professional use moves to paid plans.

Free plan allows one project with AI lighting configuration, 3D preview and PDF plan export; more projects and full export need a $39/mo plan.

Free with a brand account; design nighttime landscape renderings on a property photo and export PDF proposals, but products are FX Luminaire-only.

Free web tool to set target foot-candles, room size and reflectances and get a fixture distribution; only LEDVANCE luminaires.

Free web and mobile app for instant outdoor/sports lighting layouts and photometrics, but only using Cooper/Signify fixtures.

Free web indoor/outdoor layout calculator with printable summaries; models e-conolight's own fixtures only.

Self-serve 30-day free trial (after creating an account) to design outdoor plans, simulate effects and quote; then $29.95/mo, using only Garden Light products.

Every plan starts with a self-serve 7-day trial (no card) with full Operator access; then $29-$129/mo.

Self-serve 7-day free trial (no card) to design Christmas/permanent light mockups with measurements and watermark-free export; then $197/yr.