The best open source alternative to Adobe Acrobat DC is Stirling-PDF. If that doesn't suit you, our users have ranked more than 100 alternatives to Adobe Acrobat DC and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Adobe Acrobat DC are BentoPDF, GImageReader, Sioyek and Paperwork.
locally hosted web application that allows you to perform various operations on PDF files.
BentoPDF is a PDF Toolkit that works fully offline with no sign ups. It's fast, secure and forever free. In an era where data is a commodity, we take a different approach. All processing for BentoPDF tools happens locally in your browser.
It's not an alternative to Acrobat Pro; it lacks many features.
Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.
I love Sioyek because it has blazingly fast update time when a pdf modified. very suitable for latex with (n)vim/emacs user.
Privacy-first PDF utility (Zero-Server Architecture). Merge, split, compress, and edit PDFs 100% locally on your device. No uploads, no servers, no tracking.
Free open-source web software for signing (alone or with others), organizing (merge, sort, rotate, delete, extract pages, ...), editing metadatas or compressing PDFs.
A document viewer for the GNOME desktop. You can view, search or annotate documents in many different formats.
It's not a PDF editor, but a really nice looking viewer/reader.
PDFtk is a simple tool for doing everyday things with PDF documents. It comes in three flavors: PDFtk Free, PDFtk Pro, and our original command-line tool PDFtk Server.
OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched - jbarlow83/OCRmyPDF
It only does OCR it is not a PDF editor.
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It lacks many features and has bugs. The PDF open button sometimes disappears.