Digital PDF Signature Tool: Browser-Only, PAdES-Compliant, Zero Uploads
HonestPDF added a browser-based digital PDF signing tool that processes everything locally with no server uploads. It supports .pfx and .p12 certificates, produces PAdES-compliant PKCS#7 detached signatures with SHA-256 and RSA-2048, and includes a WYSIWYG placement interface across 20 languages.