Developer builds browser-based PDF merger with no uploads using WebAssembly

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A developer has created a suite of client-side web utilities, including a PDF merger, that operate entirely within the user's browser. The tools were built to avoid the upload limits, subscription fees, and privacy risks of typical online utility services. The technical architecture uses libraries like pdf-lib to process documents directly in browser memory without sending data to a server. This approach leverages modern web capabilities such as WebAssembly and local file handling to perform tasks like merging PDFs or converting image formats securely and privately.

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