fontinspect
Fontinspect is a command line tool that will trace the web font usage of a particular web page. It is a cut-down version of the engine that runs inside subfont, an automated font subsetter and loading optimizer.
This data-only version has been created to aid the W3C Web Font Working Group with the data analysis for the 2018 chartered Progressive Font Enrichment specification.
Installation
npm i -g fontinspect
Usage
fontinspect https://exampleurl.com
Output
The tool will output some status messages on STDERR
and stream out the measured font usage on STDOUT
.
Example output
$ bin/fontinspect https://www.zachleat.com/