FontDrop!
Also https://wakamaifondue.com/
Is there a site or tool that can tell me the metrics for a font, e.g. the cap and x heights?
Simple and easy way to view the content of font files.
Mark Simonson
OpenType (and TrueType) fonts are made up of tables which hold various kind of font data, such as metrics, naming, hints, layout features, kerning, and character outlines.
The cap height and x-height are stored in the “OS/2” table under the entries “sxHeight” and “sCapHeight”. (Some fonts, especially older ones, may not have these two entries. They are not required.)
The values are relative to the UPM (units per em) of the font. Most fonts have a UPM of 1000 (OTF) or 2048 (TTF), but other values are possible. The size of the units in a font are relative to the size at which the font is displayed. The em is scaled to the font size. The UPM can be found in the “head” table in the entry “unitsPerEm”.
For example, a typical cap height value for a font with 1000 UPM is 700 units, or 70%. So if the font is displayed at 36-point, the cap height is 70% of 36, or 25.2 points.
There isn’t a tool or site I know of that shows just metrics, but there is a site that can show most of the data in a font, including metrics: FontDrop! The metrics are shown in the “Data” tab.