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We are aware of the recently disclosed PHP2Shell vulnerabilities (CVE-2026-109618 and CVE-2026-109619) and can confirm Filestack is not impacted by these vulnerabilities.

PDF

Portable Document Format (PDF) is a file format that shows a document with the same layout on every device. It is an ISO standard (ISO 32000).

Format Features

  • Fixed page layout with text, images and vector graphics
  • Embedded fonts
  • Links, forms and annotations
  • Optional password protection

PDF in Filestack

  • Convert documents and images to PDF with output=format:pdf
  • Merge files into one PDF with pdfcreate
  • Read document details with pdfinfo
  • Convert pages to images with doc_to_images
  • Preview PDFs in the browser with the Document Viewer

Conversions in This Glossary

  • BMP to PDF
  • WebP to PDF

Documentation

Read the Filestack documentation page for this term.

Open the documentation