Stamping page numbers, headers, and footers onto standard PDF documents involves direct manipulation of the binary PDF Object Model without re-rasterizing document vectors. Utilizing local client-side WebAssembly rendering via pdf-lib, our processor opens the target PDF file buffer, parses page dimension dictionaries, and embeds Standard Type-1 fonts (Helvetica, Times Roman, or Courier) directly into the file stream.

By evaluating explicit coordinate offsets relative to page boundaries (x, y coordinates calculated in points where 1 pt = 1/72 inch), the engine draws text operators onto page content streams while maintaining strict vector fidelity. Because operations run directly in browser memory, your confidential documents are processed with zero latency and complete cloud privacy.