Plot one or more expressions and export the chart as SVG or PNG
Use x as the variable; sin, cos, tan, sqrt, abs, log, ln, exp and the constants pi / e all work. The y axis fits the data automatically and clips the top and bottom 2% so one spike cannot flatten the curve.
The plot is drawn as SVG in your browser and exports as SVG or a 2× PNG. The expressions never reach a server.