Magnet Lab is an open-ended magnetic-field sandbox. There is no objective: arrange sources, compare field patterns, place probes, and export your results.
01
Build a fieldAdd dipoles or current-carrying wires, load a preset, then drag sources into position.
02
Inspect the structureCombine particles, streamlines, vectors, and the magnitude heatmap.
03
Measure itPlace probes to record Bx, By, magnitude, and direction at exact coordinates.
04
Take it with youExport the setup as JSON, measurements as CSV, or the current canvas as PNG.
KEYBOARD SHORTCUTS
V SelectH PanP Probe
A Add magnetW Add wireDel Delete
Space Play / pauseG GridEsc Cancel
Technical note
Fields use idealized 2D dipole and straight-wire equations in normalized units with softening near each source. This is an educational visualization—not a precision engineering calculator.