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FAQ

Frequently asked questions regarding UnPDF

  • How do I open an encrypted locked PDF document
  • Can UniPDF compress and optimise PDF documents?
  • How do I merge multiple PDF documents
  • How do I add annotations to a PDF document?
  • How do I lock a PDF document with a password ?
  • How do I set and get PDF document outline
  • Does UniPDF support bitonal encoding such as CCITT and JBIG2?
  • How do I implement a text search and replace ?
  • How do I add an invisible text layer under a PDF for search?
  • Can I Change Metadata of a PDF File?
  • How PDF Coordinate Systems Works with UniPDF

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