Technical articles on PDF digital signature verification, browser-side cryptography, PAdES compliance, and building privacy-first document workflows.
Learn how to verify digitally signed PDFs entirely client-side using JavaScript and WebAssembly. No server uploads, no external services — cryptographic verification runs in the browser.
How VerifyKit renders Adobe Reader-style signature status icons (green checkmark, red cross, yellow question mark) directly in the PDF viewer using Acro6 layer appearance swapping.
Run PDF signature verification headlessly in Node.js, Deno, or Bun. Batch process signed documents, integrate into CI/CD pipelines, and build server-side validation workflows.
Understand PAdES (PDF Advanced Electronic Signatures) conformance levels as defined by ETSI EN 319 142. Learn how VerifyKit detects B-B, B-T, B-LT, and B-LTA levels for eIDAS compliance.
PDF files contain sensitive data — contracts, medical records, legal documents. Learn why client-side verification with WebAssembly keeps your documents private and never uploads them to external servers.