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From Free Law Project: finds bad redactions in PDFs, where a black box covers text that can still be selected and copied, and outputs the leaked text and positions per page as JSON. Useful for lawyers checking filings before release. Needs Python 3.10+; may miss cases, so review important files.

Python library with a CLI for Factur-X (ZUGFeRD 2.x), the French-German e-invoicing standard: combine a regular PDF invoice and XML into a Factur-X invoice, extract the XML from invoice PDFs and validate it against the official XSD; also handles Order-X and UBL. Needs Python 3.