Use Digital Signature PDF in Fileza to add, validate, or support document signatures and timestamps.
Internet connection required
Signing may need to fetch certificate chain information from your certificate issuer's server to validate the signature.
Click to select a file or drag and drop
PDF Documents
Your files never leave your device.
Upload certificate (.pfx, .p12, .pem)
Subject: -
Issuer: -
Valid: -
When enabled, a visible signature box appears on the PDF. You can upload an image/logo or add text. If neither is provided, the signer's name from the certificate will be shown automatically.
Upload image (PNG, JPG, WebP)
Processing...
Step-by-step guide
Smart guidance
Use these quick checks before and after processing so the final file is easier to trust, share, and continue working with.
Security tools can affect who can open, copy, print, or verify a document, so confirm the settings before download.
After securing a document, you can validate signatures, compress the protected file, or save it to your history.
Fileza guide
Digital Signature PDF in Fileza is made for people who need to add, validate, or support document signatures and timestamps without a long software session. Upload your PDF files, choose the settings that match the task, and create a signed PDF in a clean online workspace.
This page is helpful for business users, finance teams, legal teams, HR teams, consultants, and anyone sharing sensitive files. It fits real situations such as confidential documents, signatures, permissions, restricted files, audit workflows, and safer file delivery. Add a cryptographic digital signature to your PDF using X.509 certificates. Supports PKCS#12 (.pfx, .p12) and PEM formats. Your private key never leaves your browser. The controls stay direct, so you can understand what will happen before you run the tool, even when you are working quickly.
Fileza connects this page to related PDF tools, so one finished task can lead into compression, editing, signing, OCR, page organization, security, or another conversion. For Digital Signature PDF, the quality focus is clearer trust signals and safer document handling. This keeps the page useful and practical.
For best results, start with a clear source file and review the output before sending it to someone else. If the file contains private, business, academic, legal, or financial information, check it carefully. After using Digital Signature PDF, you can usually download the updated file or continue with related Fileza tools.
Questions
Digital Signature PDF is used to add, validate, or support document signatures and timestamps. It is part of Fileza's online PDF and file conversion workspace.
Upload your PDF files, choose the settings that match your task, run the tool, and download the signed PDF when Fileza finishes processing.
No. Fileza is designed for browser-based document workflows, so supported tasks can be handled online without installing a large desktop PDF application.
Yes. After downloading or reviewing the result, you can continue with related Fileza tools for conversion, editing, compression, signing, organization, protection, or sharing.
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