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, LEKTRA, PaperKnife and GImageReader.
Locally hosted web application offering an interactive GUI to merge, split, reorganize, convert, compress, watermark, secure, sign, flatten, repair, extract images, detect blanks, apply OCR, set permissions, and enable file processing or API integration for PDFs.
United States
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.
India
High-performance viewer for documents and images offering split tabs, customizable single or book layouts, portals for side-by-side sections, instant search, line highlight, annotation tools, link hints, searchable highlights, session management, and TOML config.
Spain
EU
Privacy-first PDF utility (Zero-Server Architecture). Merge, split, compress, and edit PDFs 100% locally on your device. No uploads, no servers, no tracking.
gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
Switzerland
Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.
United States
Paperwork is a personal document manager for scanned documents (and PDFs).
FranceEU
Free open-source web software for signing (alone or with others), organizing (merge, sort, rotate, delete, extract pages, ...), editing metadatas or compressing PDFs.
FranceEU
A document viewer for the GNOME desktop. You can view, search or annotate documents in many different formats.
United States
OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched - jbarlow83/OCRmyPDF
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.
United States
Portable PDF editor for field techs and anyone tired of Adobe. View, annotate, edit text, OCR, fill forms, sign, merge, split, and print. Free and open source: no subscription, no account, no telemetry.
United States
