Install these on your VPS to enable the PRO tools. Expose them as a simple API and call them from this page.
# Ubuntu / Debian
sudo apt update && sudo apt install -y ghostscript qpdf libreoffice-core \
libreoffice-writer tesseract-ocr poppler-utils
# OCR a scanned PDF → searchable PDF
tesseract input.pdf output pdf
# Deep compress
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 \
-dPDFSETTINGS=/ebook -o compressed.pdf input.pdf
# Real AES-256 encryption
qpdf --encrypt mypassword mypassword 256 -- input.pdf encrypted.pdf
# PDF → Word
libreoffice --headless --convert-to docx input.pdf
# PDF/A archive
gs -dPDFA -sDEVICE=pdfwrite -o archived.pdf input.pdf
# Repair corrupted
gs -o repaired.pdf -sDEVICE=pdfwrite corrupted.pdf