pdfcpu is a PDF processing library written in Go that supports encryption and offers both an API and a command-line interface (CLI). It is compatible with all PDF versions with basic support and ongoing improvement for PDF 2.0.
The parser which has been carefully crafted is able to handle most files violating the PDF specification and also repairs many corrupt files on the fly.
This is free and open source software.
Website: github.com/pdfcpu/pdfcpu
Support:
Developer: pdfcpu
License: Apache License 2.0

pdfcpu is written in Go. Learn Go with our recommended free books and free tutorials.
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