https://projectstack.cc/ weekly 1.0 https://projectstack.cc/merge-pdf weekly 0.9 https://projectstack.cc/split-pdf weekly 0.9 https://projectstack.cc/images-to-pdf weekly 0.9 https://projectstack.cc/compress-images weekly 0.9 https://projectstack.cc/about monthly 0.7 https://projectstack.cc/privacy monthly 0.7 https://projectstack.cc/terms monthly 0.7 https://projectstack.cc/contact monthly 0.7 https://projectstack.cc/faq monthly 0.6