File compression & conversion, explained
Practical, no-nonsense guides on shrinking and converting PDFs, images and Office documents — and how to do each one without losing quality.
How to compress a PDF without losing quality
Why PDFs get large, how compression actually works, and how to shrink a PDF dramatically while keeping text perfectly sharp.
Why scanned PDFs are so large (and how to shrink them)
Scanned documents create enormous PDFs. Here's the technical reason why, and the best way to reduce their size without making the text unreadable.
JPEG vs PNG vs WebP vs AVIF: which image format should you use?
A practical guide to the four major image formats — when each one wins, how much smaller WebP and AVIF really are, and how to convert between them.
How to convert a PDF to an editable Word document
What actually happens when you convert PDF to Word, why scanned PDFs need OCR, and how to get the most editable result.
How to merge and split PDF files
Combine several PDFs into one, or pull specific pages out of a document — with page-range syntax explained and tips to avoid bloated output.
How to password-protect and unlock a PDF
Add a password to encrypt a PDF, or remove a password from a file you can already open — with a clear explanation of what each one does.