A Note About Product Bundles: PDF-XChange Pro is actually a product suite that includes a PDF-XChange Standard, PDF-Tools & PDF-XChange Viewer PRO. PDF-Tools is bundled with PDF-XChange Viewer PRO.
Headline Functionality PDF-XChange Viewer(Free) PDF-XChange Viewer PRO PDF-Tools PDF-XChange Lite PDF-XChange Standard PDF-XChange PRO Volume discounted license packs available: FREE Single User Licenses Starting at $37.50 Single User Licenses Starting at $45.00 Single User Licenses Starting at $24.00 Single User Licenses Starting at $44.00 Single User Licenses Starting at $74.00 Windows OS/Support - Windows XP, Vista, Win7 (32/64 bit) PDF Specification Support (assumes latest is Acrobat 8 - PDF spec 1.7) ISO PDF/A 1b Specification Support Viewing only Viewing only     Terminal Server/Citrix Compatible Multi Language UI Support Output Documents from any WIndows application & create new PDF file         View PDF Pages/Files (Requires PDF-XChange Free Viewer Installation)       MS Office Toolbar Addin and integrate enhanced MS -> PDF Functionality         Complete control over PDF creation properties     Limited Batched & “watched” Folder Conversion to PDF of MS Office documents         Create Interactive Adobe PDF Forms (requires MSWord 2003 webforms)         Scan directly to PDF       Convert Images/Text direct to PDF (wi thout using a 3rd party application)       Manipulate/Modify Existing PDF files   Limited   Add only Mark-up, add Commenting Type etc. on PDF files       Extract Content from PDF to Text/Image/PDF formats       Excryption/Security options     Digital Signature Support     Optimization/Compression control       Font Embedding Options     Always Embeded Paper/Custom Forms options     Control Resolution/Scaling     Add Watermarks/Overlays       Developers API available (subject to licensing)     NEW! - OCR Image and Scanned based PDF files       Partial Feature List   Portable Version Available           Resolution - Max DPI output N/A N/A 2400 2400  2400  2400  Scaling allowed N/A N/A nUp, Booklet, Brochure Page printing provided       Mirrored Printing Supported       Include 'Clickable' URL links - literal       Include 'Clickable' URL links - embedded (e.g. 'Click Here') MS Office only         Add Clickable URL links to an existing PDF       Convert MS Office Table of Contents (TOC) 'Clickable Links' to PDF         Convert MS Office Web Forms to interactive Adobe PDF Forms         Add Watermarks (Text & Image)       PDF Overlay Options (overlay one PDF onto another)       Image/Text Compression options when converting to PDF   Auto Auto Auto (JBIG2,JPEG,JPEG2000 Runlength, ZIP, LZW CCIT3/4) Auto Auto Auto Graphics Downsampling options (Linear, Bilinear, Bicubic)       Also Colour -> Grayscale -> Mono options       PDF File Optimization for advanced content control         Complete Font Embedding control       PDF Security/Encryption Options (40, 128 and 128AES bit options)     Automated Bookmarks Creation options - Enhanced       Add/Edit/Modify Bookmarks     Add Automated Headers/Footers Creation options - Enhanced       Add document Information/Metadata/XP Metadata       PDF user defined File naming control via Macro/Javascript rules*     Automated Email send via SMTP/MS MAPI compliant options     Create Job Profiles and save settings for later job specific use         Advanced Memory Management       Scan directly to PDF       Convert Image files to PDF - Raster/Metafile Image Formats       Convert PDF to Image Format (Raster Formats only - BMP, JPEG, TIFF etc)     Convert PDF to .DOC/.RTF (no OCR capability)         Extract PDF Page/File, Image content to an Image File (BMP, JPEG, TIFF etc)         Extract PDF Page/File, text content to a text file etc (no OCR capability)       Extract PDF Pages to a new PDF file       Merge PDF files       Append/Insert Pages from 1 PDF file into another PDF file       Re-Number Pages/Files         Comprehensive Job Management Features         Append/Insert New pages to an existing PDF     Merge PDF files       Append/Insert Pages from 1 PDF file into another PDF file       Delete, Rotate, Crop PDF pages       Highlight/Cross Out/Underline existing PDF page text     Add Shapes & Objects to a PDF Page     Add Image/Signature to a PDF Pages/Files     Add Hyperlink to a Page/File       Custom Stamps     Export Adobe Forms Data (to .FDF)     Search PDF file for Text (Advanced and Simple)     Complete and save PDF Forms for later Editing/Email/Posting     Integrates w/ Translations tools like ABBYY Lingvo 12, Translate It!, etc     Re-Order Pages (Drag and Drop via Thumbnail View)       Browser Integration (IE, Firefox etc)       Portable Version available - just 4Mb     Scan Pages and create new file or add to an Existing file       Overlay PDF Pages       Navigation Tools such as 'Loupe' and the 'Pan' included                   PDF-XChange Viewer PRO - Upcoming Feature list These features will be provided free to all Version 3 Licensed users   ( feature already available in PDF-Tools application) Re-Number Pages/Files       Resize Pages/Files       Re-Optimize PDF File       Personalise Viewer User Interface       Add Watermarks (Text & Image)       Add Thumbnails       Ruler with Grid lines for Group operations with Annotations       Extract Image content from a page to an Image File       Group Operations with Annotations       Form Field Editing (Edit Field Properties)       Proof Reading Mark-up options/symbols support       Export Text to .RTF/.DOC Formats (no OCR Capability)       Improved Text Functions with CJK Fonts

Important Notes:

Some features indicated may be in a bundled application included rather than the actual named application. e.g. Mark-up & Commenting functions available with all versions of PDF-XChange/PDF-Tools are provided in the PDF-XChange Viewer(free and PRO) - not in the Print driver or PDF-Tools applications directly.

We strongly advise all users to download and test the evaluation versions prior to purchase to avoid disappointment as refunds are only offered in the event serious and uncorrectable flaws are uncovered. All evaluation versions downloaded can be converted to licensed installations by simply re-installing the same download and inserting a legitimate serial number on request.

This product comparison chart is not an exhaustive list all features and functions - merely an indication of the minimum features provided within each product bundle available.