Microsoft Font Validator
A tool that evaluates how closely a TrueType or OpenType font adheres to the current font format specification, as well as whether the font meets basic recommendations and deliverable guidelines from Microsoft. The Font Validator can be useful to developers creating or modifying fonts, or to developers who are creating tools to generate valid fonts. The Validator performs tests of 'static' data as well as tests for run-time errors. Embedded CFF validation is not supported.
