qpdf
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qpdf | pdfarranger | |
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18 | 93 | |
3,052 | 3,009 | |
4.7% | 7.1% | |
9.5 | 8.9 | |
4 days ago | 8 days ago | |
C++ | Python | |
Apache License 2.0 | GNU General Public License v3.0 only |
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qpdf
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🔍Underrated Open Source Projects You Should Know About đź§
QPDF is a CLI tool that performs content-preserving transformations on PDF files. We have another tool for managing files!
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Insecure Features in PDFs
Given how well Preview.app and Safari work for viewing >99% of PDFs I actually encounter in the wild, this article makes Apple's engineering decisions look good.
It also confirms many suspicions I've had over the years that have led me to, e.g., running all PDFs from questionable sources through VirusTotal before viewing on platforms where I wouldn't normally run antivirus software.
The original article also confirms my suspicions that this step is inadequate:
Because the Launch action can be considered as a danger- ous feature, we conducted a large-scale evaluation of 294,586 PDF documents downloaded from the Internet, in order to research if there are any legitimate use cases at all. Of those documents, only 532 files (0.18%) contained a Launch action. While none of the files was classified as malicious according to the VirusTotal database, we conclude that the Launch action is rarely used in the wild and its support should be removed by PDF implementations as well as the standard.
Incidentally, the Launch action is still present in the most recent version of the PDF standard[1], with only OS-specific launch parameters deprecated (which include passing arguments to the launched executable, so eliminating the deprecated feature is still a significant security gain).
Finally, I'm both personally and professionally curious about how the non-DoS examples in this articles may apply to non-viewer PDF tools and libraries like qpdf[2] and Ghostscript's original and recently reimplemented PDF interpreters[3].
[1] https://pdfa.org/resource/iso-32000-pdf/
(registration required, but at least the base standard is available at no cost; sadly, important incorporated standards like ISO 21757-1:2020 [ECMAScript for PDF] are not)
[2] https://qpdf.sourceforge.io
[3] https://ghostscript.com/blog/pdfi.html
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Jim Keller criticizes Nvidia CUDA, x86 – 'CUDA's a swamp, not a moat, like x86'
I know you're talking about GUI editing, but I've found libqpdf[1] incredibly useful for making programmatic PDF edits with minimal (typically no) structural disturbance.
[1] https://qpdf.sourceforge.io
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How to remove all metadata & identifiers when uploading Elsevier articles to libgen?
Solved this. So the string which we were concerned about depends on the time, which is why it changes everytime a new document is generated with the same source PDF. it is a meaningless string really. from the documentation, it gives this explanatin. To be sure, i raised an issue with the guys at QPDF and they were quick to answer the question too. The explanation theyve given is even more clearer.
- I wanna design UI/Ux for open source!
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qpdf.el: A transient Emacs wrapper for qpdf
Hi, this is my first Emacs package! It provides a transient wrapper for the qpdf command-line tool aimed especially at users of pdf-tools or at least DocView. With it one can, for example, remove/reorder/split/rotate pages of a pdf file, merge pdf files, remove annotations, and apply a range of transformations to a pdf file. See the qpdf documentation.
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The New Ghostscript PDF Interpreter
There are some here, as test files in the qpdf library: https://github.com/qpdf/qpdf/tree/main/qpdf/qtest/qpdf
(I wrote a low-level PDF parser and ran it over the PDF files that happened to be present on my laptop—just regular ones—and ran into some files that (some) PDF viewers open but even qpdf doesn't. I say "even" because qpdf is really good IMO.)
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Ask HN: Why is the PDF format so inaccessible?
If you're comfortable handling the (typo)graphical aspects of the PDF yourself and have the ability to consume a C++ library, I've had good experiences using the Apache-licensed qpdf[1] library to handle the low-level structural aspects of the PDF standard. It's particularly convenient when your application requires structure-preserving integration of existing PDF content.
Simple example applications, each completed in 2–3 days, both in C#, using C++/CLI to integrate libqpdf:
1. Overlaying fixed-format text on pre-existing blank PDF form pages, ensuring the content of each distinct form page is embedded exactly once, and that all necessary assets (fonts, images, etc.) from the blank form PDF pages are included in the output PDF.
2. Losslessly combining a sequence of PDF, TIFF, and JPEG images into a single PDF with bookmarks pointing to the first page of each source file and existing image compression maintained where possible. In this application, only the source TIFFs were anything other than arbitrary (i.e., the TIFFs were more-or-less baseline images coming from a small number of scanning systems, but the JPEGs and PDFs came from all sorts of different applications).
[1] https://github.com/qpdf/qpdf
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unlocking pdfs WITH password
Use qpdf https://github.com/qpdf/qpdf
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Quick macOS terminal command to batch remove user password from PDF
I was looking for a way on macOS to batch remove the user password from a bunch of PDF files that had the same password. I found the easiest way was to use qpdf with the following command:
pdfarranger
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Pdftool.org: modify pdfs offline in the browser
On Linux I like to use:
https://github.com/pdfarranger/pdfarranger and https://gitlab.com/scarpetta/pdfmixtool for such tasks.
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Wechsel von Windows auf Linux - zu viele Programme Windows-only?
FĂĽr PDFs verwende ich pdfarranger.
- Transition from Windows to Linux: is there a way to do this things on linux too?
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A note of appreciation for paperless ngx
I see some questions in the comments about document splitting and if you are using PDF for the export in scanning, this adds an extra step but may be valuable in the long run. For Linux users at least, there is "pdfarranger" which most distros have. You can install that, load the PDF and re-arrange pages, remove pages, etc.
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An open-source pdf editor?
PDFArranger
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What's a really niche tool you use that you can't live without?
So, I guess, pdfarranger might be faster than PDFSam. https://github.com/pdfarranger/pdfarranger
- Converting a PowerPoint that's been exported the wrong way?
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Software to convert many JPG's into a PDF or similar.
I like PDF Arranger for converting JPEGs to PDFs (open source on Windows) https://github.com/pdfarranger/pdfarranger.
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PDF Arranger KDE Alternative?
I have always only been using PDF Arranger for manipulating PDF files (merging different files, arranging, adding, deleting pages) and I'm wondering if there really is no KDE equivalent for that application.
- Can anyone recommend a free PDF splitter?
What are some alternatives?
pdfcpu - A PDF processor written in Go.
pdfsam - PDFsam, a desktop application to split, merge, mix, rotate PDF files and extract pages
pikepdf - A Python library for reading and writing PDF, powered by QPDF
AppImageKit - Package desktop applications as AppImages that run on common Linux-based operating systems, such as RHEL, CentOS, openSUSE, SLED, Ubuntu, Fedora, debian and derivatives. Join #AppImage on irc.libera.chat
pdf-lib - Create and modify PDF documents in any JavaScript environment
pdfslicer - A simple application to extract, merge, rotate and reorder pages of PDF documents
OpenPDF - OpenPDF is a free Java library for creating and editing PDF files, with a LGPL and MPL open source license. OpenPDF is based on a fork of iText. We welcome contributions from other developers. Please feel free to submit pull-requests and bugreports to this GitHub repository.
ExpansionCards - Reference designs and documentation to create Expansion Cards for the Framework Laptop
TCPDF - Official clone of PHP library to generate PDF documents and barcodes
nautilus-pdf-tools - Tools to work with PDF files from Nautilus
puppeteer - Node.js API for Chrome
web-pdf-toolbox - Simple web toolbox for PDF files