CFF Viewer

The tool accepts CFF data from standalone CFF files or CFF blocks embedded in font containers. It parses core structures such as the Top DICT, Private DICT, and CharStrings to produce a structured overview of glyph counts, subroutines, and encoding maps. Conceptually, it treats the CFF data as hierarchical indices, where the CharStrings INDEX defines glyph outlines and the DICT entries provide global font parameters. Users—font developers, QA engineers, typography researchers—benefit by obtaining a machine-readable summary suitable for integration into pipelines, defect analysis, or documentation. Core features include file ingestion, structural validation, and a compact JSON export for downstream tooling. The tool deliberately focuses on inspection and verification, not editing or rendering, and does not require network access. Unique value lies in its targeted CFF1/Type 2 outline analysis and quick validation of font integrity within standard font containers. Use cases include rapid glyph-count verification during font iteration, detection of missing subroutines, and preparation of data for font QA reports. The tool also provides an exportable summary that can be consumed by automated validation suites.
Output highlights emphasize accuracy of glyph counts, subroutines, and encoding maps, with traceable DICT keys for debugging.