Stamp custom page numbers ('Page X of Y') and confidentiality headers onto PDF documents.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Enter or configure your target inputs and parameters in the clean interface.
Calculations, formatting, and generation occur instantly in-browser using WebAssembly and WebCrypto.
Copy formatted results or download generated assets with a single click.
Zero-egress companion tools in the PDF Utilities suite
Convert color PDF pages to monochrome grayscale to reduce printer ink and file size.
Split PDF pages into separate Odd (1, 3, 5) and Even (2, 4, 6) documents for manual duplex printing.
Inspect embedded image resolutions, color spaces, and compression formats inside PDF files.
Verify whether a PDF document is optimized for Fast Web View page-by-page streaming.
