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How this works

The Playground runs on a WebAssembly bundle of about 3 MB, loaded once by your browser. Every demo processes files locally on your machine; nothing gets uploaded anywhere. It's the same Rust PDF engine that ships in the PDFluent SDK, not a cut-down web version, so a result here is the same result you'd get calling the SDK directly.

That makes this useful two ways: as a quick way to try a feature, and as a way to check whether the SDK handles one of your own real PDFs correctly before you write any integration code.