Q12 – A constraint-based 2D drawing tool
Q12 is a new web-based 2D parametric drawing tool built specifically for geometric problem solving, for playing interactive "what if" games with drawings, and for the design and optimization of mechanisms. Q12 has the usual set of drawing constraints found in other CAD tools (e.g. "lines are parallel") but also supports inequality constraints, area constraints, and arbitrary expressions between geometric quantities. We built Q12 to solve problems like those below, after finding that existing CAD systems couldn't handle them well: * Given dimensions on a surveyor's map, figure out if the…
Q12 – A constraint-based 2D drawing tool launched on February 18, 2026 with 7 votes, #1,385 of 16,627 launches that month and more than 75% of that year's launches.
What it does
Q12 is a web-based 2D drawing tool for makers and engineers. Solve geometric problems with constraints, explore interactive “what if” scenarios, and design mechanisms in real time. It supports advanced constraints including inequalities, area, and arbitrary expressions between geometric quantities. This is the first public release - excited to see what you build with it.
In the maker’s words, at launch
Q12 is a new web-based 2D parametric drawing tool built specifically for geometric problem solving, for playing interactive "what if" games with drawings, and for the design and optimization of mechanisms. Q12 has the usual set of drawing constraints found in other CAD tools (e.g. "lines are parallel") but also…
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