PDFEncrypt
QPDF
PDF Unshare
iSafePDF
PDFTK Builder
PDFtk
PDFZilla Batch PDF Encryptor
PyPDF2
PDFManagerUltimate
Wide Angle PDF Converter
Apowersoft PDF Converter
AnyMP4 PDF Converter
Foxit PhantomPDF
Merge PDF (by Smallpdf)
Icecream PDF Converter
PDF Converter Elite
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Based on our record, PDFEncrypt seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
PDFEncrypt has been super useful for doing something that none of the other open source PDF tools seem to do ... https://pdfencrypt.net/. Source: over 1 year ago
I built PDFEncrypt (https://pdfencrypt.net) a couple years ago based on a very simple need from a client: to encrypt PDF files via a native Windows app, for free. I have been amazed at the number of visitors (4000/mo), emails, downloads, and donations the project has received. I released it as open source software, and I'm now working on V2 (almost done!) which is a complete rewrite based on user requests, as... - Source: Hacker News / about 2 years ago
QPDF - QPDF is a command-line program that does structural, content-preserving transformations on PDF...
Wide Angle PDF Converter - Convert PDF documents to Word, PowerPoint, Excel, JPG and other formats!
PDF Unshare - pdf unshare, pdf protection, protect, share, updf, prevent, Lock PDF, Encrypt PDF, PDF Access, Lock, PDF, Encrypt, Access
Apowersoft PDF Converter - Apowersoft PDF Converter is a safe and stable PDF converter, which can quickly convert PDF to Word, PPT, Excel, JPG, PNG and many more formats.
iSafePDF - iSafePDF is a free open source PDF protection software.
AnyMP4 PDF Converter - With versatile and powerful functions, AnyMP4 PDF Converter can absolutely convert PDF format to diversified images (TIFF, JPEG, PNG, GIF, and others) and document files (Text, Word, Excel, EPUB, HTML, and more) on Mac.