Font Substitution
Fallback behavior when requested fonts are unavailable.
Definition
Viewer or converter swaps fonts to nearest available alternative.
Why it matters
Can cause layout shifts after conversion.
Related PDFHQ workflows
Use this concept when optimizing, converting, validating, or troubleshooting document workflows.
Related Knowledge
Font programs stored in a document so text renders consistently.
DOC is the legacy binary Word format used in older Microsoft Office workflows and long-lived enterprise archives.
ODT is an OpenDocument text format focused on interoperable office authoring.
RTF is a text-based rich text interchange format that predates modern XML office packaging.
EPUB is an e-book packaging format designed for reflowable digital publishing.
PPT is the legacy binary PowerPoint format used in older presentation systems.
DOCX is the default modern Word format built on OOXML package parts and XML document markup.
HTML is the standard markup language for web documents and browser rendering.
PPTX is the modern OOXML presentation format used for most slide authoring workflows.
Fonts and encoding behavior for Chinese, Japanese, and Korean scripts.
Tools to Apply This
Convert PowerPoint files into PDF format.
Convert HTML files to PDF for sharing, printing, archiving, and document workflows.
Convert Microsoft Word documents into PDF format.
Convert PDF documents into editable Word files.
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