While there are a number of different types of PDF file formats, they all fall under the umbrella term of PDF documents. A PDF form is a type of PDF document that has editable form fields a user can fill out. Typically, parts of the document are static and can’t be changed in a PDF form. These usually include questions and instructions for those who end up filling out the form later on. In a PDF form, the content fields a user fills out are typically open to editing and can offer a list of possible answer options or can be written in freely.

Yes. They are two entirely different document formats. While you can export from one file format to another, they are not the same. Word file formats are usually used for word processing, editing, and making changes to text. PDF documents on the other hand, are most often utilized for viewing, sharing, and printing documents. Additionally, Word files can be read and/or written to and contain some version of the “.doc” file format. Whereas PDF files are typically read-only and contain the “.pdf” file format.

Yes. If you have a PDF document that you do not want anyone else to be able to edit, you can protect the file. You can do this by opening the file in Acrobat, clicking Tools > Protect. Then you have a few options as to whether you want to just restrict editing with a password, or if you want to encrypt the file for further safety. Once you choose how you want to protect the PDF document, you can set a password and save.

Yes, many free PDF editors such as our top pick PDF Candy, allow you to merge two or more PDFs into one. As most free PDF editors are browser-based, you will just need to open up the PDF editor application or website in your browser and click the “Merge” option. It will then ask you to add the files of all PDFs you wish to merge. Once the files have been added, just make sure that they are in the correct position and alignment you want before proceeding with the merge. Afterwards, all of your previously PDF files will be merged together into one new PDF document.

Yes and no. Google doesn’t provide a designated free PDF editor itself, but there are third-party Chrome extensions that you can use to help get the job done. Alternatively, you can make use of Google Drive to edit a PDF document. Simply upload the document onto your Google Drive and then select the file and right-click and select Open with > Google Docs. The file will be opened as an editable Google Docs text document. Then just make your edits and when you’re finished click File > get > PDF Document to revert it back to a PDF file.

This method is a quick and easy way to edit a simple PDF document, but be careful as Google Docs can run into formatting issues if your original document has complex visual formatting such as tables and graphs. In this case, it’s best to use a designated free or premium PDF editor.