Browser-based engineering tools
XL4Sim — Online Engineering Simulation Tools
XL4sim is a growing collection of engineering modules developed from decades of practical experience.
Rapid, transparent first-pass analysis for structural, thermal, and dynamic problems. No installation. Clear assumptions. Practical outputs.
Built for engineers, designers, technicians and students. Use for concept exploration and preliminary sizing.
What you can do here
- Structural: beams, frames, buckling, vibration, bolted joints
- Dynamics: drop shock, base excitation, vehicle dynmaics
- Thermal: air and water heat sinks, HVAC load estimates
- Rubber Part Design: stiffness, molded shrinkage, shear strains, state-of-cure
- Design trade studies: fast parameter exploration
Tip: Start with the module directory if you’re not sure where to begin.
Open the module directory →
Fast first-pass answers
Get directional results in minutes to guide early design decisions.
No installation
Runs entirely in the browser — accessible anywhere, easy to share. Note some of the modules use WebGL for mouse control of a page object. Check https://get.webgl.org if your browser supports WebGL.
Transparent methods
Assumptions and equations are visible so you can validate and trust outputs.
Workflow-friendly
Designed for quick iteration, scenario comparison, and documentation.
Tool categories
Browse by discipline. Each category links to curated modules and a full directory.
Structural & Mechanical
Start here
New to XL4Sim? Use the directory to find the right module quickly.
Open module directory View examplesBuilt on established engineering principles and years of practical experience.
Modules are intended for preliminary design, feasibility checks, and concept exploration.
