golang pdfcpu example command

pdfcpu_example.md

pdfcpu

https://github.com/pdfcpu/pdfcpu

Watermark

https://pdfcpu.io/core/watermark

pdfcpu stamp add -mode text "Hello World!" "op:0.2, s:1.0 rel" in.pdf out.pdf
pdfcpu stamp add -mode image "my_pic.jpg" "op:0.2, s:1.0 rel" in.pdf out.pdf

Encrypt & Decrypt

https://pdfcpu.io/encrypt/decryptPDF

pdfcpu encrypt -upw upw -opw opw decrypt.pdf encrypted.pdf
pdfcpu decrypt -upw upw encrypted.pdf decrypted.pdf