Features of VeryPDF PDF Compressor: 1. Support Windows 2000 / XP / Server 2003 / Vista / Server 2008 / 7 of both 32-bit and 64-bit. 2. Support subsample, average and bicubic downsample methods to reduce image size. 3. Support JPG and Zip compression methods to reduce color and gray images. 4. Support Zip, RLE, JBIG2, and CCITT Group 4 methods to compress monochrome images. 5. Support to embed, compress and subset fonts of PDF. 6. Support to edit PDF descriptions including title, author, subject, keywords. 7. Support user password and owner password to protect PDF. 8. Control permissions of printing, assembly, copying and commenting PDF. 9. Support batch process: Compress multiple PDF files with one click.