HonestPDF introduces a fully browser-based digital PDF signing tool in this update. Sign documents with your own certificate files without uploading anything to a server.
TL;DR
A new Digital Signature tool lets you sign PDF documents directly in the browser using .pfx or .p12 certificate files. All processing is local, signatures are PAdES-compliant using PKCS#7 detached format with SHA-256 and RSA-2048, and the tool is available in 20 languages.
What's New
- PAdES-compliant digital signatures: Produces PKCS#7 detached signatures using SHA-256 + RSA-2048, compatible with formal, legal, and regulated document workflows
- Browser-only processing: No files are uploaded at any point. All cryptographic operations run client-side
- .pfx/.p12 certificate support: Load your own standard certificate files directly in the browser
- WYSIWYG signature placement: Drag and position your signature visually on the document before embedding
- 20-language support: Full translations shipped from day one across all UI strings
- Navigation and sitemap updated: New tool added to site structure, with full SEO metadata and Open Graph tags
How to Use
- Open the Digital Signature tool at https://www.gethonestpdf.com/
- Upload your PDF (processed locally, never sent to a server)
- Load your .pfx or .p12 certificate file and enter the password
- Place your signature visually using the WYSIWYG interface
- Download the signed PDF with an embedded PAdES-compliant PKCS#7 signature
FAQ
Is my PDF or certificate file uploaded to HonestPDF servers?
No. All processing happens entirely in your browser. Neither your PDF nor your certificate file is transmitted to any server at any point.
What signature standard does this use?
The tool produces PAdES-compliant signatures using PKCS#7 detached format, SHA-256 hashing, and RSA-2048 encryption. This is widely accepted in legal, enterprise, and regulated document contexts.
What certificate formats are supported?
The tool supports .pfx and .p12 certificate files, which are the standard formats for personal digital certificates issued by certificate authorities.
Will the signature be recognized by PDF readers like Adobe Acrobat?
Yes. PAdES-compliant PKCS#7 signatures are the standard format recognized by Adobe Acrobat, Foxit, and other major PDF readers that validate digital signatures.