I want to recommend this gem of PDF library in Rust

It's a Pdfium bindings library in Rust. It has many features not seen in other PDF crates and it's well maintained.

https://github.com/ajrcarey/pdfium-render

https://crates.io/crates/pdfium-render

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disclaimer: I'm not the author but have used it in production for almost a year and feel like it deserves more attention.