tech tip thursday: a nifty (free) PDF app for mac.

I spend a lot of time dealing with PDFs. And solving PDF-related problems.

For instance, I’ve written before about how to unlock a PDF when you don’t have the password.

Yesterday’s challenge: insert a signature (JPG file) into a locked PDF.

Preview doesn’t like to add JPG files to PDFs. (Preview, the Mac PDF app, is my default viewer/editor, by the way.)

I have Acrobat Pro and while it does a lot of neat things, it’s too much trouble to use for simple things … like quickly adding a JPG signature to a locked PDF file.

A few seconds (literally) on Google and I found the perfect solution.

FormulatePro. An open-source project hosted on Google Project Hosting (source on GitHub).

FormulatePro is a simple PDF editor that lets you easily add JPG files to any PDF. Even locked ones. Simply open the PDF in FormulatePro, go to File —> Place Image, and drop the image into the PDF. You can resize the dropped image and move it around the PDF, to achieve perfect placement.

(You also can easily add text to a PDF with FormulatePro, which makes it a super-quick way to fill out forms.)

Simply export the edited file as a new PDF or print to PDF.

FormulatePro is a handy, lightweight PDF tool that you should have in your Mac Toolbox.