Products Adobe Acrobat 9 Standard Adobe Acrobat 9 Pro Mac Preview 5 PDF Studio 6 Standard PDF Studio 6 Pro
Works on Windows, Mac and Linux Yes Yes No Yes Yes
View, print, and search PDF files Yes Yes Yes Yes Yes
Permissions & Passwords Yes Yes No Yes Yes
Commenting tools: sticky notes, graphical annotations Yes Yes Yes Yes Yes
Pencil tool to draw free form scribbles Yes Yes No Yes Yes
Typewriter tool to type text anywhere Yes Yes No Yes Yes
Audio comment Yes Yes No Yes Yes
File Attachments Yes Yes No Yes Yes
Apply rubber stamps Yes Yes No Yes Yes
Create custom image stamps Yes Yes No Yes
with scale

Yes
with scale

Create custom text stamps No No No Yes Yes
Add text highlights, underscore and strikethrough Yes Yes Yes Yes Yes
Add and edit hyperlinks Yes Yes Yes Yes Yes
Split, merge documents Yes Yes No Yes

Yes
advanced split

Export & Import Images Yes Yes No Yes Yes
Scan to PDF Yes Yes No Yes Yes
Optical character recognition (OCR) Yes Yes No No No
Create fillable PDF forms Yes Yes No No No
Fill and save PDF forms Yes Yes

very buggy

 Yes Yes
Create PDF from other formats Yes Yes use Save As PDF in print dialog from scan, images* from scan, images*
Correct text in original PDF Yes Yes No No No
Modify images in original PDF Yes Yes No No No
Comment review history Yes Yes No Yes Yes
Digitally sign PDF documents Yes Yes cannot even view signatures No Yes
Certify PDF documents using digital IDs Yes Yes No No Yes
Google Docs integration No No No Yes Yes
Acrobat.com integration Yes Yes No Yes Yes
CJK fonts Yes Yes Yes Yes Yes
Work with multiple documents (batch) No No No No Yes
Preflight, PDF/X No Yes No No Yes
PDF bookmarks or outlines Yes Yes No Yes Yes
Precision measuring tools (distance, perimeter, area) Yes Yes No Yes Yes
Permanent redaction Yes Yes No No No
Support PDF portfolios Yes Yes No view view
Reduce file size Yes Yes No No No
Price USD $299 USD $449 Free USD $60 USD $95

* Even though PDF Studio does not support directly converting Microsoft Office documents to PDF, it is possible to do so by uploading documents to your Google Docs account and then opening the documents as PDF in PDF Studio. All this can be done without leaving PDF Studio.