- annotated-pdf-spec VS pdfquery
- annotated-pdf-spec VS pdfsyntax
- annotated-pdf-spec VS PyMuPDF
- annotated-pdf-spec VS i7j-rups
- annotated-pdf-spec VS betterwrite
- annotated-pdf-spec VS pandoc
- annotated-pdf-spec VS mupdf
- annotated-pdf-spec VS polyfile
- annotated-pdf-spec VS WeasyPrint
- annotated-pdf-spec VS pdf-issues
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annotated-pdf-spec reviews and mentions
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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
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