TTF Checker

Purpose-built tool for font teams to validate TrueType and OpenType fonts before release. It analyzes structural and data-quality aspects such as glyph metrics, naming data, and core tables to surface issues that affect rendering and embedding.
The tool follows OpenType specifications to parse tables like head, hhea, maxp, cmap, and naming, checking for consistency, proper ranges, and non-deprecated entries. It can highlight mismatches between units per em and vertical metrics, ensure familyName and subfamilyName are unique, and detect missing or corrupted tables that would degrade compatibility.
Benefits include earlier defect detection in design-to-publish pipelines, reduced rework for font families across platforms, and improved reliability for web and application rendering. Its value varies by role: font developers gain actionable fixes; QA teams obtain traceable reports; publishers ensure assets meet distribution standards. Core features are modular: required validations guarantee baseline correctness; optional checks address advanced typography scenarios such as variable fonts, hinting status, and cross-file consistency within a family. Use cases include pre-release audits, vendor handoffs, and CI checks for font assets embedded in products.