Open any PDF file, and if Preview recognizes that it contains form elements, an AutoFill Form button appears in the upper-right corner of the PDF window.

Learn how to add page numbers to PDF files using free online tools or PC software. You can set position, font, etc., for page numbering.

To edit a PDF file on your Android for free, you can use the Adobe Acrobat Reader: Edit PDF app. While you can’t modify existing text or images with a free account, you can add new text ...

There's a free PDF editor built into every Mac, but what if you need a bit more functionality and precision? Here are the best apps for editing PDFs on a Mac.

You can find free PDF editors on the internet, but their most important features tend to be behind a paywall. Here we recommend five free PDF editors.

If you need to edit PDF on iPhone in a hurry, you can do so without having to install any new app. Just use the native Files app. Let's show you how.