Why I Built a 100% Private PDF Signer (No Server Uploads)

Short summary

A developer built MyDigitSign, an open-source client-side PDF signing tool that never uploads files to a server. The app runs entirely in the browser using Next.js and standard browser APIs, offering draw, type, or upload signature options. The author cites the ESIGN Act and eIDAS regulation to argue self-generated electronic signatures are legally valid for most agreements.

• •MyDigitSign processes PDFs entirely client-side — no server uploads, preserving document privacy
• •Supports drawn, typed, or uploaded signatures rendered as transparent PNGs overlaid on PDF pages
• •Open-source and free, citing ESIGN Act (US) and eIDAS (EU) for legal validity of electronic signatures

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