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financeMEDIUM2026-04-22 16:50 UTC

How I Built a Privacy-First PDF Tool Using pdf-lib and the Canvas API

A few weeks ago I got frustrated with online PDF tools. Not with their functionality — iLovePDF and Smallpdf are genuinely useful. What frustrated me was what happens to your files after you click upload. Your file travels from your browser to a remote server over HTTPS During step 4, your file exis

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