OpenAltFinder

Open Source #pdf Projects

Discover open source software tagged with pdf.

PdfDing

PdfDing

Self-hosted PDF manager, viewer, and editor with multi-device sync, tagging, and an in-browser reader; deployable via Docker.

Alternative to:
Adobe AcrobatAdobe Acrobat
ConvertX

ConvertX

Self-hosted online file converter supporting 1000+ formats including documents, images, video, audio, and e-books.

Alternative to:
CloudConvertCloudConvert
Sioyek

Sioyek

Cross-platform PDF viewer focused on textbooks and research papers with smart navigation, marks, bookmarks, and bibliography jumping.

Alternative to:
Adobe AcrobatAdobe Acrobat
KillerPDF

KillerPDF

KillerPDF is a lightweight, fully portable PDF editor for Windows. Edit, merge, annotate, and sign PDFs locally with no subscription, accounts, or hidden telemetry anywhere on your computer.

Alternative to:
Adobe AcrobatAdobe Acrobat
Paperless-ngx

Paperless-ngx

Self-hosted document management system with OCR, full-text search, and automatic tagging for your paper documents.

Alternative to:
Google DriveGoogle Drive
EmbedPDF

EmbedPDF

A PDF viewer that seamlessly integrates with any JavaScript project

Alternative to:
Adobe Acrobat ReaderAdobe Acrobat Reader
Pympress

Pympress

Lightweight GTK PDF presenter for dual-screen setups, showing current slide, next slide, and presenter notes on separate displays.

Alternative to:
Adobe AcrobatAdobe Acrobat
SumatraPDF

SumatraPDF

Lightweight, free PDF, eBook, and comic reader for Windows that launches instantly and stays out of the way; multi-format support with minimal interface.

Alternative to:
Adobe AcrobatAdobe Acrobat
Koodo Reader

Koodo Reader

Cross-platform ebook reader supporting PDF, EPUB, MOBI, comics and more, with sync across Windows, macOS, Linux, Android, iOS, and Web.

Alternative to:
Adobe AcrobatAdobe Acrobat