Files with the .pdf extension belong to the «Documents» group. MIME type: application/pdf.
PDF file format: extension, MIME type and available conversion directions.
Conversions from PDF
Conversions to PDF
Related articles
termFont embedding
Storing typefaces inside the file so the document looks the same anywhere.
termPDF text layer
Characters stored alongside the page image — search and copying rely on it.
termPDF/A
A subset of PDF meant for long-term archival storage.
termScanned PDF
A PDF that contains only page images: the text cannot be selected or searched.