Interactive Simulations& Professional Engineering Tools
Free simulators, calculators, and analysis tools for science, engineering, and finance. From beam deflection to thermodynamic cycles, structural analysis to portfolio optimization — explore, calculate, and verify.
Why Choose Simulations4All?
Our platform combines cutting-edge technology with educational best practices.
WebGPU Powered
High-performance rendering for complex interactive simulations.
AI Assistant
Your own AI assistant running locally in your browser. No subscriptions, no fees.
Interactive Learning
Adjust parameters in real-time and visualize complex concepts.
SimLab — Compute Anything in Your Browser
510+ MATLAB®-compatible functions. Matrix operations, symbolic math, plotting, signal processing, control systems, and more. No installation. No license fees.
- ✓ Full programming: for loops, functions, if/else
- ✓ Interactive plotting with Plotly.js
- ✓ 16 ready-to-run example scripts
- ✓ MATLAB® costs $2,150+/year — SimLab is free
Trending Simulations
Trending today
ML Algorithm Visualizer
Interactive machine learning algorithm visualizer with 6 algorithms: Linear Regression, Logistic Regression, KNN, K-Means Clustering, Decision Tree, and SVM. Click to add data points, watch decision boundaries form in real-time, and step through algorithms iteration by iteration. Includes preset datasets (XOR, circles, moons, blobs, spiral), hyperparameter tuning, accuracy metrics, and animated training.
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Decision Tree / Random Forest Builder
Interactive Decision Tree and Random Forest builder. Select built-in datasets (Iris-like, Weather, Loan Approval), build decision trees step by step watching entropy and Gini impurity calculations at each split, then ensemble into a Random Forest and watch accuracy improve. Includes animated tree growth, data point classification flow, feature importance charts, OOB error estimates, and optimization panel for max depth, min samples, and number of trees.
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Solar System Simulator
Free 3D solar system simulator with accurate orbital mechanics. Zoom into planets, track real orbital periods, and compare sizes and distances. Includes all 8 planets, dwarf planets, and moons. Perfect for astronomy students. Try it free!
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Refrigeration Cycle Calculator
Free refrigeration cycle simulator. Calculate COP, cooling capacity, and compressor work for R-134a, R-410A, and other refrigerants. Visualize P-h and T-s diagrams with state points. Perfect for HVAC and thermodynamics students. Try it free!
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PID Controller Tuning Simulator
Free PID controller tuning simulator. Adjust proportional, integral, and derivative gains to optimize step response. Visualize overshoot, settling time, and steady-state error in real-time. Perfect for control engineering students. Try it free!
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Photosynthesis Lab Simulator
Free photosynthesis rate simulator. Adjust light intensity, CO2 concentration, and temperature to measure oxygen production rate. Identify limiting factors and optimal growing conditions. Perfect for biology and botany students. Try it free!
View SimulationNewest Simulations
Recently published simulations fresh from our lab
Manifold Learning Explorer: Projecting High-Dimensional Data with t-SNE and UMAP
Interactive manifold learning explorer. Project Swiss roll, S-curve, clusters, and sphere data from 3D to 2D using t-SNE, UMAP, PCA, and Isomap side by side. Watch the embedding relax frame by frame, tune perplexity and n_neighbors, and see why a flat 2D picture can hide very different high-dimensional structure.
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Galaxy Collision Simulator
Real-time N-body simulator of two disk galaxies colliding. Set the mass ratio, pericenter, approach speed, disk size and inclination, then watch tidal tails and bridges emerge from pure gravity in the Toomre & Toomre style.
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Cloud Formation Simulator
Watch a rising air parcel cool, saturate, and build a cloud in this interactive meteorology simulator. Set surface temperature, dew point, and humidity, choose a lifting mechanism (convective, orographic, frontal), and trace the parcel path on a skew-T-style diagram. Computes the lifting condensation level (LCL), cloud base and top, level of free convection, CAPE, CIN, and atmospheric stability. Free educational tool for Earth science and meteorology students.
View SimulationYour Personal AI Tutor — Running Locally in Your Browser
Meet your new study companion. Our AI Tutor runs entirely on your device using WebGPU — no cloud servers, no subscriptions, no data leaving your computer. Choose from three models based on your device's capabilities and get instant help understanding any simulation.
Lite
~1.4 GB • Desktops, laptops & Chrome iOS (experimental)
Fast responses for quick questions. Perfect for phones, tablets, and older laptops.
Standard
~2 GB • Desktops & laptops only
Best balance of speed and quality. Great for most laptops and desktops.
Advanced
~2.3 GB • Desktops & laptops only
Best reasoning for complex physics problems. Requires modern GPU with 4GB+ VRAM.
Device Compatibility
Explore by Category
Browse simulations organized by subject area
Astronomy
Stars, planets, galaxies
13 simulationsBiology
Cells, genetics, ecosystems
33 simulationsChemistry
Reactions, molecules, elements
26 simulationsComputer Science
Algorithms, data structures
71 simulationsEarth Science
Geology, weather, climate
17 simulationsEngineering
Structures, circuits, systems
425 simulationsFinance & Economics
Financial concepts, investment strategies, and economic principles.
45 simulationsHealth
Body systems, disease prevention, and wellness.
38 simulationsMathematics
Algebra, geometry, calculus
30 simulationsPhysics
Mechanics, waves, thermodynamics
73 simulationsSocial Sciences
Policy models, social dynamics, and decision-making.
26 simulationsReady to Get Started?
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