Don't let your sensitive data fall into the wrong hands. These tools encrypt important PDFs without the need to spend hundreds of dollars on the full Adobe Acrobat program.

Sending important documents? Learn how to password protect PDFs for extra security using easy steps with Adobe Acrobat and free online tools.

To password protect a PDF in Adobe Acrobat Reader, you'll need the paid Pro version, which starts at $14.99 a month.

You don't need the full Adobe Acrobat Pro just to sign a PDF. The free Adobe Acrobat Reader can easily handle that job.

PDFs are as popular as ever, from the workplace to your social life – here's how to edit them in Adobe Acrobat for free When you purchase through links on our site, we may earn an affiliate ...