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Browser-based file converters can process documents and photos without uploading them

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A DEV Community post argues that many online file converters send user files to remote servers, exposing sensitive documents and private photos. It contends that modern browsers can handle most conversion tasks locally using Canvas, WebAssembly, and JavaScript libraries. The author describes tools covering image formats like HEIC, PDF editing, 3D file viewing, and developer utilities that run entirely on the user's device. The post acknowledges that very large files may process more slowly on older hardware than on a server. The author, who promotes their own tool suite, invited readers to suggest additional browser-based utilities.

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