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pdf tips

Useful perspectives on documents, digital work and the tools that move you forward.

Illustration of a PDF document secured with a yellow padlock by PDFDOK Protect PDF

Oct. 1, 2026

How to Password Protect a PDF: Encrypt Your Documents Online

Learn how to add a password to a PDF online, choose a strong password and share protected documents safely.

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Illustration of one PDF document being split into three separate PDF pages with PDFDOK

Oct. 1, 2026

How to Split a PDF: Extract Pages or Separate a PDF into Files

Learn how to split a PDF online, extract specific pages and break large documents into smaller, easier-to-share files.

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Illustration of two PDF files being merged into one PDF document with PDFDOK

Oct. 1, 2026

How to Merge PDF Files: Combine Multiple PDFs into One

Learn how to combine several PDF files into one organized document online — reorder pages, remove extras and download a single PDF.

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Illustration of a 24 MB PDF being compressed to a 3 MB PDF with PDFDOK

Oct. 1, 2026

How to Compress a PDF: Reduce PDF File Size Without Losing Quality

Learn how to compress a PDF online and make large files small enough to email, upload or store — without installing software.

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