Free pdf encrypt tool software for windows

Free PDF Tools to Merge, Split, Reorder, Encrypt, Decrypt, Rotate, Crop, Reformat, Header, Footer, Watermark, Images to PDF, PDF to Images, Form Fields Delete/Flatten/List, PostScript to PDF, PDF Information, Scan to PDF, and Create Transparent Image.
Merge two or more PDF files into a single PDF file; Extract or Reorder pages from a PDF file into a new file; Encrypt or Decrypt PDF documents with 40 or 128 bit Encryption; Rotate pages by 90, 180, and 270 degree; Crop a page to modify its layout of Print or View by specifying its margins; Put multiple pages into one page to save paper and inks when printing hard copies with note lines for handout; Add Headers and Footers to present information, such as date, time, page numbers, or the title of the document, in the top or bottom margins of a document; Add stamp using a formatted text in your international language; Add Stamp using image file (bmp, jpg, gif, png, tiff, and wmf); Convert images (bmp, jpg, gif, png, tiff, and wmf) into a PDF file with layout options; Save PDF pages into images (png, jpg, bmp and tiff) with DPI options; Delete, Flatten or List the PDF Form Fields inside a PDF file; Convert Postscript file into PDF; Add information (Title, Author, Subject, Keywords, Created, Creator, Producer and Version) to the PDF document; Scan your Paper Form or Photo into images (PNG, JPG, BMP, TIF and GIF) or PDF; Create a transparent image with options to adjust one Color and the left Colors transparency.
Version 7.0 adds Win7 support, PDF Information, Scan to PDF, Create Transparent image for PDF.

A useful PDF management application that can encrypt, decrypt, join, split, stamp and rearrange a PDF file PDFTools is a useful PDF management application that can encrypt, decrypt, join, split, stamp and rearrange a PDF file.
PDFTools is easy to use application. Its main window gives easy access to all features available in PDFTools.
Main features:
- Encrypt PDF:
This option allows you to password protect any PDF file. Also, you can specify additional features for protected PDF.
Note: Some of the features are only available if you select 128 bit encryption.
- Decrypt PDF:
This option allows you to create a protection-free version of a encrypted PDF file.
- Join PDFs:
This option allows you to create a PDF file by joining multiple PDF files.
- Split PDF:
This option allows you to split a PDF file in multiple ways. You can split each page to new PDF, split even pages to new PDF, split odd pages to new PDF, split after given page number, split at every given page count or split a range of pages to new PDF file.
- Stamp PDF:
This option allows you to overlay (or stamp) a Text or Image over a PDF file.
You can overlay Text/Image at pre-defined location in pages or at any custom location by giving its X and Y position.
For text, in custom position you can define angle (in Degrees) for text.
For Image, you can define the scaling for image. Scale option is available for both pre-defined location and custom location.
- Rearrange PDF:
This option allows you arrange pages in a PDF file. You can reverse all pages, copy multiple pages on single page or create handout style pages.
- Create PDF:
This option allows you create a PDF file from xml file. For more information see PDFToolss XML to PDF guide.
System requirements:
- JRE/JDK (1.4+)

PDF Memo Creator is a free and useful software that can create PDF documents with graphics.