A web widget for reliably plotting function graphs, parametric curves and certain fractals.
Beware: The UI and plotting is quite slow due to the cost of reliable arbitrary-accuracy arithmetic running within your browser.
To speed up rendering, tune the plots with very low accuracy and increase accuracy only for the final rendering.
The above images are obtained by drawing shapes that reliably enclose the exact objects.
In particular, rounding errors are correctly accounted for.
These graphical enclosures can be computed to an arbitrarily high accuracy.
In the images below the same objects are plotted with a low accuracy so that the shapes are easy to see.
The following are high and low accuracy plots of an infinitely winding spiral:
Also, see the screenshots folder and slides for a school outreach featuring plots produced by this tool.