Font Embedding And Licensing

Font Embedding And Licensing

Acknowledgement: Shared by Peter Bamuhigire, techguypeter.com.

Use When

• A typeface is chosen and must now be loaded/embedded into a web page, DOCX, PPTX, PDF, or XLSX so it renders correctly on machines that lack it.
• Verifying that an embedding is licence-compliant before shipping a client deliverable.

Do Not Use When

• No font has been chosen yet — use font-selection-and-pairing first.

Required Inputs

• The chosen typeface(s) and their licence basis (from premium-font-scan).
• The output format(s) and whether the artifact is distributed externally.

Workflow

1. Confirm the licence permits embedding for this format and distribution (doctrine/references/licensing-and-embedding.md). If not, fall back to an OFL alternative and state the substitution.
2. Load per format (doctrine/references/embedding-by-format.md):
   • Web: woff2 + @font-face (or Google Fonts link); variable font where available; fallback listed after the chosen face; font-display: swap.
   • DOCX / PPTX: apply by name, embed, subset ("characters used only").
   • PDF: ensure the generator embeds rather than referencing system fonts.
   • XLSX: apply by name; for pixel-perfect branded output, deliver as PDF instead.
3. Set the fallback as a safety net, never as the design.
4. Verify the rendered artifact shows the intended face (not a substitute) and report file- size impact for embedded documents.

Anti-Patterns

• Embedding a font whose licence forbids redistribution.
• Shipping DOCX/PPTX without subsetting (bloat) or PDF that references system fonts (substitution).
• Treating the fallback as the design.
• Assuming local rendering proves embedding; verify on a clean environment.
• Subsetting away required glyphs or OpenType tables; test the final artefact.

Quality Standards

• Stop release if permission, glyph coverage, or actual embedding cannot be verified.
• Inspect the final distributable, not only its source or local preview.
• Record font version, subset scope, fallback, and file-size impact.

Outputs

• The artifact with the chosen font correctly loaded/embedded, licence-verified, with fallback and (for documents) subsetting applied.

Examples

• See examples/embedding-worked-spec.md for verified web and document embedding decisions.

Decision Rules

Capability Contract

Read is required; edit and execute only for authorised implementation and verification. Do not alter binaries, remove licences, or distribute raw files beyond granted terms. Network may verify authoritative rights.

Degraded Mode

Without embedding or render inspection, provide a conditional specification and verification checklist, marking delivery unverified. Recover with an OFL fallback when rights cannot be established.

• examples/embedding-worked-spec.md — a worked embedding spec for one chosen face (Clash Display, Fontshare) across web (woff2 @font-face + variable + font-display), DOCX (embed + subset), and PDF (embed-not-reference), each with its licence check (OFL vs Fontshare redistribution rule) and file-size impact.

References

• doctrine/references/embedding-by-format.md, licensing-and-embedding.md.