PhyDraw — a free physics diagram maker

PhyDraw is a browser-based editor for drawing the figures that go into physics worksheets, question papers and slides, and exporting them as clean vector SVG that stays sharp at any size. Nothing to install, and no account.

• Physics equation editor — type LaTeX or pick from a searchable palette of 193 symbols.
• Circuit diagram maker — cells, resistors, capacitors, meters and switches on a snapping grid.
• Optics diagram maker — ray diagrams for convex and concave lenses and mirrors, with the image position solved as you drag.
• Free-body diagram maker — blocks, inclines, pulleys, springs and labelled force vectors.
• Graphing and data plots — plot functions with labelled roots and turning points, or paste columns of measurements straight from a spreadsheet.
• Chemical equations — subscripts, charges and equilibrium arrows set correctly.
• Thermodynamics — pressure–volume curves for isothermal, adiabatic, isobaric and isochoric processes.
• Dimensions and callouts — measured annotation for any drawing.

Every diagram exports as SVG with its text converted to vector outlines, so a figure opens correctly in Affinity Designer, Illustrator or Inkscape without needing the font installed.

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