annotated-pdf-spec
pdf-issues
| annotated-pdf-spec | pdf-issues | |
|---|---|---|
| 1 | 2 | |
| 5 | 62 | |
| - | - | |
| 10.0 | 8.8 | |
| about 2 years ago | 4 days ago | |
| - | - |
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annotated-pdf-spec
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Show HN: I am building a new Python library to read/write PDF files
As others have already written, there are many slightly invalid PDF files out there in the wild that many readers can display mostly fine and which your library should also be able to handle.
If you can, grab yourself a copy of the most recent PDF 2.0 specification since it contains much more information and is much more correct in terms of how to implement things. Also have a look at the errata at https://pdf-issues.pdfa.org/32000-2-2020/index.html.
As I'm implementing a PDF library (in Ruby), I have started to collect some situations that arise in the wild but are not spec-compliant, see https://github.com/gettalong/annotated-pdf-spec. That might help you in parsing some invalid PDFs
pdf-issues
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Show HN: I am building a new Python library to read/write PDF files
Merely for your consideration, if those were actual issues on that repo, (a) it would allow adding labels to them (as in https://github.com/pdf-association/pdf-issues/issues?q=is%3A... ) (b) folks could comment, acting as a low-rent stackoverflow, and (c) it would allow anyone to contribute new ones versus the "PR against README.md" situation right now
That also more closely matches the mental model of those items: bugs against the specification, whether the official PDF Association agrees that they are or not
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What to showcase on my github?
https://github.com/pdf-association/pdf-issues https://www.iso.org/standard/75839.html
What are some alternatives?
pdfquery - A fast and friendly PDF scraping library.
pdfsyntax - A Python library to inspect and modify the internal structure of a PDF file
PyMuPDF - PyMuPDF is a high performance Python library for data extraction, analysis, conversion & manipulation of PDF (and other) documents.
release - Potabi's Release Engineering repository
i7j-rups - RUPS is an acronym for Reading and Updating PDF Syntax. RUPS is a tool built on top of iText® that allows you to look inside a PDF document and browse the different PDF objects and content streams.
pdfplumber - Plumb a PDF for detailed information about each char, rectangle, line, et cetera — and easily extract text and tables.
betterwrite - :bookmark_tabs: A Creative Word Processor.
pandoc - Universal markup converter
QuestPDF - QuestPDF is a modern open-source .NET library for PDF document generation. Offering comprehensive layout engine powered by concise and discoverable C# Fluent API. Easily generate PDF reports, invoices, exports, etc.