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PDFx: Combine several PDF documents into one
PDFx is a superset of the PDF specification that allows PDF files to be concatenated into a single backward-compatible file without needing zip archives or directories.
PDFx is a format that allows multiple PDF files to be stored within a single file while remaining fully backwards compatible with any PDF reader. It is an open format, available for macOS, Windows, and Linux. It is developed with Electron, TypeScript, and React.
Why a vibe-coder should care
If you often need to share groups of documents (contracts, reports, portfolios), PDFx makes it easy to replace zip files with a single file that can be opened by anyone.
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