Lessclicking

The design loop, from model to simulate to iterate, in a single browser tab. Make more with LessCAD.

Start free →How it works →
Live demo

Problem

Built for those who cannot afford to wait.

Access

Sim software is expensive, and the expertise to run it is rare.

Runs in the browser. No installs, no seats, no license fees.

Speed

CPU-bound solvers mean waiting on one result before trying the next idea.

Physics runs in parallel on your GPU. Free and unlimited.

Workflow

Geometry and simulation live in separate tools. Every change starts over.

One kernel keeps modeling and physics in the same space.

01 The kernel · powers Model

One Hybrid Kernel, Two Ways To Model

Draw it with parametric precision, then sculpt it like clay, on the same geometry. No exporting to a mesh app and re-importing a dead shell. Most tools make you pick one world. LessCAD holds both.

  • Parametric dimensions, constraints and assemblies
  • Organic sculpting on the same body
  • One source of truth, no round-trips
Parametric to sculpt

02 The engine · powers Simulation

Your GPU is the solver.

Physics runs on your machine, massively parallel across the GPU you already own. A better card just means more physics. And because it runs on your hardware, not our servers, it is unlimited and it is free.

  • FEA stress, thermal and modal, no meshing
  • Parallelized in WebGPU, results in seconds
  • Free and unlimited, bounded only by your hardware
Live GPU solve

03 The representation · powers Iteration

Geometry an AI can edit alone.

LessCAD represents each part as a volume, not a tree of named surfaces and edges that can go stale. An edit just re-evaluates the volume, whether a person makes it or an AI agent does. Nothing to repair, nothing to rebuild.

  • Edit any parameter without cascade failures
  • Parts stay independent, change one, keep the rest
  • A volume-based representation, not fragile face or edge references
AI edit, nothing breaks

The design loop

Model. Simulate. Iterate. Without leaving the loop.

The full design loop, made possible by a new kernel, meshless physics solvers, and volume-based geometry that never breaks.

ModelingSimulationIteration

Important questions

What engineers ask first.

01How accurate is the physics, can I trust it?+
LessCAD is built for fast, screening-grade analysis. Today we are targeting about 10% accuracy against published NAFEMS and other analytic benchmarks, and we are working to close that gap over time. Right now it is made to catch obvious problems early in your design, not to replace certification-grade verification. Learn more about how our solvers work.
02What do I need to run it, and do I need a powerful GPU?+
Just a WebGPU-capable browser. LessCAD automatically uses however much GPU your browser gives it, so everyday parts run fine on integrated graphics and a dedicated card simply solves larger models faster. WebGPU ships out of the box in Chrome or Edge 113 and up, and Safari 26 and up. On Linux and other browsers you may need to enable it explicitly in settings. We may ship a desktop version later that can tap into more GPU power directly.
03What physics can it run today?+
Linear stress, steady-state thermal, modal, and buckling, all meshless, all on the GPU. CFD is in the works and currently in beta.
04Are my projects private?+
Yes. Projects are private by default. Publishing to a public page is an explicit, opt-in action. You are never public unless you choose to be.
05How does collaboration work?+
You can share any design with a link, and the recipient opens it in the browser with no install. Real-time, multi-person editing is in early beta on the Studio plan. Because designs are private by default, nothing is shared until you send a link or publish it.
06What can I export?+
STL for printing, plus real STEP and BREP for fabrication and hand-off to other CAD, actual geometry, not a dead mesh. Your work stays portable, and export always works.
07Do I have to use AI?+
No. The whole tool works by hand: model, sculpt, and simulate with no AI at all. AI is optional acceleration, and when you use it, it edits your parametric model with full visibility rather than dropping a black-box mesh.
08Is it really free?+
Yes. Modeling, sculpting, assemblies, unlimited physics, private files, and STEP and STL export are free forever. Paid plans add more capable AI, not core features.

Design more. Click less.

Free forever to model and simulate. Runs in your browser, nothing to install.

Robotics

Robotic arm gripper

A parametric two-finger gripper. Adjust the jaw and run stress on the pivot.

Open in editor →
Drones

Quadcopter frame

A lightweight arm frame. Tune wall thickness and check modal frequencies.

Open in editor →
Structural

Mounting bracket

An L-bracket under load. Vary the fillet and watch the stress concentration.

Open in editor →
Browse all templates →
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