Tool
Font Metrics
Browser app
Metrics inspector
A browser-based font metrics and outline inspector for quick technical checks outside the editor.
Font Metrics is a lightweight browser tool for reading spacing and vertical metrics more directly when a type family needs a quick technical check outside the font editor.
The live app lets you choose a bundled font or upload your own, switch variants, inspect variation axes, and toggle guides, axes, and nodes. It also includes a basic information panel and SVG export for fast snapshots of what you are reviewing.
It started as a small practical visualizer for a variable icon font and stays intentionally simple: a focused way to inspect outlines and metrics without turning the page into a full editing environment.