Draw Free Body Diagrams Online
Place pin supports, distributed loads, moments and dimensions as ready-made symbols, instead of building each one out of rectangles and arrows. For students, engineers, and educators.
No account needed to start. Built for desktop and laptop.
Every line color, fill and support style is yours to set.
Classic, dark modeExamples
11 worked diagrams — beams, trusses, frames, blocks on inclines, pulleys, and springs.
Black on white, one line weight. What an assignment or a printed report wants.
What you can draw
Supports
Pin, roller, fixed, and hinge supports drawn to textbook convention, placed in one click.
Loads
Point loads, distributed loads, moments, torsion, springs, and pulleys.
Annotations
Dimension lines, angle arcs, and text with superscript, subscript, and a math font.
Export
Download any area as PNG or SVG, at the resolution you choose.
Not only free body diagrams: with ortho, snapping, dimensions and SVG export, the same tools handle a quick 2D sketch — a layout, a section, a detail you want to hand someone — without opening a CAD package.
Free and Membership
Free, no account
$0 forever
- 14 of the 26 tools: lines, rectangles, circles, triangles, and curves
- Pin, roller, fixed, and hinge supports, plus point loads
- Grid snapping, object snapping, ortho, undo, grouping, and rotation
- As many diagrams as you like, with no account
Nothing is saved when you close the tab. Exporting, cloud projects, and templates need a Membership.
Membership
From ~$3.33/month, billed annually
- All 26 tools, including distributed loads, dimensions, callouts and springs
- Export to PNG or SVG, at the resolution you choose
- Save up to 20 projects to the cloud
- 11 ready-made templates, plus 100 of your own
- Custom colors on every element
- Keep up to 100 structural analysis models against your account
Also here: structural analysis
Beams, trusses and frames, solved
BetaDraw a plane structure, put loads and load combinations on it, and read the reactions, the axial, shear and bending moment diagrams, the deflected shape, and a report you can print. Solved by the direct stiffness method — linear elastic, small displacements.
- Free for anyone signed in while the beta lasts: every part of the tool, and the report you can print. The browser remembers the model you are working on.
- Membership adds one thing: keeping models in your account — as many as you like, opened again from any machine.
- An account is needed to open it — it is not a signed-out tool.
New to any of this?
Two courses of step-by-step guides: free body diagrams from the first sketch to the equilibrium equations, and the direct stiffness method a frame is actually solved by.
Go to Guides & Tutorials