Is SimLab really free?

Yes. SimLab is 100% free to use with no signup, no license, and no usage limits. It runs entirely in your browser at simulations4all.com/simlab.

Do I need to install anything to use SimLab?

No installation is required. SimLab runs entirely in your web browser. Just open simulations4all.com/simlab and start writing MATLAB-compatible code immediately.

Does SimLab run my existing .m files?

Most script-style .m files run with little or no change. You can open .m files via the file picker or drag-and-drop. SimLab supports MATLAB®-compatible syntax including varargin/varargout, persistent and global variables inside functions, implicit expansion, command-style function calls, and 510+ built-in functions. On import, SimLab automatically translates away classdef (OOP) blocks, top-level global/persistent/import declarations, and a few renamed functions — it surfaces warnings for each translation. Advanced toolbox-specific functions may require minor adjustments.

How is SimLab different from MATLAB Online?

MATLAB Online is the official MathWorks product and requires a paid license (from $2,150/year for individual commercial use). SimLab is a free, independent, browser-based alternative with MATLAB-compatible syntax. It is not affiliated with or endorsed by The MathWorks, Inc.

How is SimLab different from GNU Octave?

GNU Octave requires local installation and runs as a native desktop app. SimLab runs 100% in the browser with no install. Both are free and MATLAB-compatible, but SimLab is optimized for zero-friction access and sharing scripts via URL.

Can SimLab plot figures, Bode diagrams, and 3D surfaces?

Yes. SimLab supports 2D and 3D plotting including plot, plot3, surf, mesh, contour, polar, heatmap, and subplot. Control systems plots including Bode, Nyquist, root locus, and step responses are also supported.

What MATLAB functions does SimLab support?

SimLab implements 510+ MATLAB-compatible functions across linear algebra (eig, svd, lu, qr), signal processing (fft, filter, conv), control systems (tf, bode, step), optimization (linprog, fmincon, fminunc), symbolic math (diff, int, simplify), statistics (mean, std, regress), and ODE solvers (ode45, ode23, ode113).

Does SimLab work on mobile devices?

SimLab works on tablets and larger mobile screens. For a full workspace experience with side-by-side editor, console, and figure panels, a desktop or laptop browser is recommended.

SimLab

MATLAB®-compatible workspace

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