Cos PDF is a free PDF software with all the tools and functions users need. In addition to viewing and printing PDFs with Cos PDF, users also have access to a variety of commonly used tools covering annotation, file format conversion, text insertion, stamping, signing, and page editing, etc. All features of Cos PDF are available for free, bringing you the best PDF reading & editing experience with a one-stop tool set.

Cos PDF could help you to:

View PDFs easily:
• View PDF in single page or two pages mode
• Print PDF documents
• Zoom in/out the view of PDFs freely

Add Annotations as you want:
• Highlight/ Underline/ Strikeout texts with customized colors
• Insert shapes including rectangle, circle, line, and arrows
• Write on PDFs with the Ink function
• Type in texts with the font size you need
• Annotate PDFs with notes

Sign and Stamp PDFs:
• Sign PDFs with keyboard, trackpad, or image file
• Stamp PDFs with preset images, or customize one you want

Convert PDFs to/from Other File Formats
• Convert PDF to Word, Excel, PNG, TXT
• Convert Word, Image to PDF

Page Reorganization:
• Add blank pages at any place
• Reorder pages with simple drag & drop
• Rotate pages clockwise or counterclockwise
• Add/delete/extract pages with PDFs
• Split/merge PDFs

PDF Compressor
• Compress PDF to reduce the file size