pdfjam vs unionpdf

pdfjam

The pdfjam package for manipulating PDF files (by rrthomas)

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unionpdf

A universal pdf rendering/editing library (by jichang)

PDF React Rendering Editing pdfium

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jichang.github.io

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pdfjam		unionpdf
	Project
4	Mentions	3
347	Stars	8
-	Growth	-
7.0	Activity	7.7
4 days ago	Latest Commit	6 days ago
Shell	Language	TypeScript
GNU General Public License v3.0 only	License	MIT License

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

pdfjam

Posts with mentions or reviews of pdfjam. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-08-13.

Pdftool.org: modify pdfs offline in the browser
7 projects | news.ycombinator.com | 13 Aug 2023

Some time ago I had success with https://github.com/rrthomas/pdfjam for that purpose.
It used to be included in the standard Debian repositories but that no longer seems to be the case which might mean it is an unmaintained project that has build issues. Worth trying though, if it builds on a modern system.
Looking for a utility/suite for working with PDF files and documents
4 projects | /r/linuxquestions | 23 Aug 2022

There is pdjam which might be a part of what you are looking for.
meirl
5 projects | /r/meirl | 16 Jul 2022

If you have a standard package manager, look up pdfjam for pretty good CLI editing.
Very new user who just merged a pdf, I'm in love
3 projects | /r/linux | 29 Sep 2021

I use https://github.com/rrthomas/pdfjam/ for that since ages in case you're interested in alternatives.

unionpdf

Posts with mentions or reviews of unionpdf. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-08-13.

Pdftool.org: modify pdfs offline in the browser
7 projects | news.ycombinator.com | 13 Aug 2023

For anyone want to build a tool like this, you can try my WIP library here, it's based on Pdfium and Wasm, you can build a tool support editing and previewing with it.
https://github.com/jichang/unionpdf
PDF Rendering Library for Web
1 project | news.ycombinator.com | 23 Dec 2022
UnionPDF: a WIP library for showing PDF with react
1 project | /r/npm | 19 Nov 2022

GitHub - jichang/unionpdf: A universal pdf render in React

What are some alternatives?

When comparing pdfjam and unionpdf you can also consider the following projects:

pdftk

pdfmixtool

Files - Building the best file manager for Windows

xournalpp - Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input from devices such as Wacom Tablets.

pdfsam - PDFsam, a desktop application to split, merge, mix, rotate PDF files and extract pages

pdfarranger - Small python-gtk application, which helps the user to merge or split PDF documents and rotate, crop and rearrange their pages using an interactive and intuitive graphical interface.

tesseract-ocr - Tesseract Open Source OCR Engine (main repository)

naps2 - Scan documents to PDF and more, as simply as possible.

LibreOffice - Read-only LibreOffice core repo - no pull request (use gerrit instead https://gerrit.libreoffice.org/) - don't download zip, use https://dev-www.libreoffice.org/bundles/ instead

mupdf - mirrored from git://git.ghostscript.com/mupdf.git

openoffice - Apache OpenOffice