Browser-based engineering tools
Preliminary analysis,
fast.
XL4Sim is a growing collection of engineering modules built from decades of practical experience — for structural, thermal, dynamic, and rubber mechanics problems.
No installation. Clear assumptions. Practical outputs in minutes.
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 dynamics
- 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
Directional results in minutes to guide early design decisions — without setting up a full FEA model.
No installation
Runs entirely in the browser — accessible anywhere, easy to share. Some modules use WebGL; check get.webgl.org if needed.
Transparent methods
Assumptions and equations are visible so you can validate and trust the outputs.
Built for trade studies
Designed for quick iteration, scenario comparison, and concept exploration.
Module directory
Browse by discipline. Click any module to open it directly.
Structural & Mechanical
- Beam Analysis Bending, shear, deflection for any user defined multiple segmented configuration including pinned joints, translational and rotational springs. An optimum beam designer option is available.
- Axial Buckling Euler and nonlinear critical load estimations for columns under compression. The user defined multiple segments column can be supported by translational and rotational springs.
- Trusses & Frames Member force analysis for planar truss and 2D and 3D frame structures. Static and modal solutions available.
- Bolts & Bolted Joints Preload, joint stiffness and separation analysis. A joint design option is available given external loads.
Dynamics
Thermal & Flow
- Air-Cooled Heat Sinks Fin performance and thermal resistance for forced or natural convection.
- Water-Cooled Plates Channel or tube sizing and thermal performance for cold plates. Including parallel and serpentine tubing configurations.
- Building HVAC Loads Heating and cooling load estimates for multiple story buildings. Wide range of wall, roof and solar configurations available.
Built on established engineering principles and years of practical experience.
Modules are intended for preliminary design, feasibility checks, and concept exploration. Results should be verified independently before use in safety-critical applications.
