Guides · 3 articles
Basics
How PDFs work, why they get large and what happens to your files.
Guides
- Why is my PDF so large? The common causesA PDF with a few pages can be tens of MB. Find out what bloats it (scans, photos, fonts) and how to shrink it without damaging the document.
- Are online PDF tools safe? How to check for yourselfMany PDF websites upload your files to their servers, others process them in your browser. Here's how to tell the difference and protect sensitive documents.
- Completed PDF form shows up blank for the recipientThe recipient sees only empty fields in the PDF form you filled in? Form fields are a separate layer. Flatten the form so everything stays visible.