Webware

Portable Document Formats (PDFs) are one of those file formats that can cause quite a headache. Sometimes, you want to convert them to a Word file. Other times, you want to convert the Word file to a PDF. But doing so isn't always easy.

Luckily for you, there are a variety of online tools that can modify PDF files quickly and easily. Here are some of my favorites that work right in your browser:

Create Adobe PDF Online does a number of things well. It can convert a variety of file formats to PDF including applications and Web pages. It can also combine multiple PDFs into a single file. When you choose to convert a file, you have the option of getting it e-mailed to you in an attachment, or simply have it load up in your browser. In either case, it takes a couple of minutes for it to deliver the finished product, making it a little slower than some of the other tools in this roundup. If you can wait though, it works quite well.

Webware -- in PDF -- thanks to Create Adobe PDF Online.

(Credit: Screenshot by Don Reisinger/CNET)

Document Converter eXPress from Neevia is a feature-packed app that lets you convert files from any number of formats into a PDF. You can choose from image files like JPEG, PNG, TIFF, and BMP. You're also able to roll back the file's compatibility to be able to work with previous versions of Adobe Acrobat, dating back to version 3.0. There's also a tool to add encryption and a watermark.

Document eXPress lets you go back in time with Acrobat.

(Credit: Screenshot by Don Reisinger/CNET)

Loop PDF is one of the simplest PDF conversion tools in this roundup. You have to create an account to use it, but after you do, the free tool lets you add PDFs from your computer or URLs, and combine them into a single document. You can also convert other file types into PDFs. Loop PDF easily converted files in just a few seconds for me.

Loop PDF makes it quick and easy to upload files.

(Credit: Screenshot by Don Reisinger/CNET)