FF Chartwell
Scribble Tone · 2011

A typeface family that uses OpenType features to convert typed numeric strings into pie, bar, line, radar, rose and ring charts, keeping the underlying data fully editable.
About
Released in 2011 and later added to the FontFont library in 2012, FF Chartwell encodes chart-rendering logic directly into font files via OpenType Stylistic Sets, so typed numbers are visually interpreted as graphs without leaving the text layer. Seven chart variants are included: pie, bar, line, area, radar, rose and ring. The web version substitutes font files with a JavaScript library to achieve equivalent behaviour in browsers.
Classification
FF Chartwell is an unconventional display typeface that uses OpenType features to render editable text strings as charts and graphs, placing it firmly in the display category as a tool-driven, purpose-built typeface rather than a traditional text face.