Q. What is PDF Signer software?
PDF Signer software allows users to sign PDF documents digitally, ensuring the authenticity, integrity, and non-repudiation of the content.
Q. What are the minimum system requirements for PDF Signer?
To install and operate PDF Signer, your system should meet the following minimum requirements:
- Operating System: Windows 8 or later
- RAM: Minimum 2 GB (Suggested 4 GB recommended for optimal performance)
- Digital Signature: USB token-based digital signature certificate
- Framework: Microsoft .NET Framework 3.5 or higher
- Additional Software: Adobe Reader (version 7 or later)
Q. Can I install PDF Signer software on Linux or macOS?
No, PDF Signer is designed exclusively for the Windows operating system and is not compatible with Linux or macOS.
Q. What types of signatures are supported?
The software is compatible with USB-based digital signature tokens and supports both Class 2 and Class 3 digital signature certificates.
Q. What file formats are supported?
PDF Signer software supports PDF (.pdf) documents only.
Q. Do I need an internet connection to run PDF Signer?
PDF Signer is a desktop-based application and does not require an internet connection for signing documents. However, an internet connection is required for the Sign-Up/Sign-In functionality.
Q. Can I sign multiple documents at once (bulk signing)?
Yes, PDF Signer supports bulk signing, allowing multiple documents to be signed in a single operation.
Q. How do I verify a digital signature in a PDF?
Open the signed PDF in a viewer such as Adobe Acrobat Reader. Go to the Signature Panel to view the certificate details and verify the signature status.
Q. What is a digital certificate?
A digital certificate is a secure digital identity issued by a trusted Certificate Authority (CA) that verifies the signer’s identity when applying a digital signature.
Q. Can I sign at a specific location on a page?
Yes, PDF Signer allows you to specify the signature location using:
- Pixel-based coordinates for precise placement
- Drag & Drop for manual placement on the document
Q. While signing, can I protect the PDF with a password?
Yes, PDF Signer allows you to enable password protection for signed documents. This option can be activated in the "Sign and Generate PDF" panel, where you can set a custom password for security.
Q. How many documents can be signed at once?
The number of documents you can sign at once depends on the system performance and software configuration. There is no hard limit, but performance may vary with higher volumes.
Q. Do I need to keep the digital signature token connected to the system?
Yes, the USB token must be connected to the system at the time of signing, as it is required to authenticate the signer and apply the digital signature.
Q. Can I use this software on multiple machines?
Yes, PDF Signer supports multi-user environments. It can be installed on multiple systems and used over a Local Area Network (LAN) with a valid licensed version, provided all systems are within the same network.
Q. Can I sign documents over the network by installing the software on Machine A and storing documents on Machine B?
No, the documents to be signed must reside on the same machine where the PDF Signer software is installed.
Q. Does your software store our signed or unsigned documents?
No, PDF Signer does not store any documents. All operations are performed locally, and data remains within your system.
Q. How can we contact your team for technical assistance?
You can contact our support team directly at 079-69-012345 for any technical assistance.
Q. When I try to sign in to PDF Signer, I receive a message saying “Mobile Number and Email ID are already registered. Try again with another Mobile and Email ID.” What should I do?
This message indicates that your mobile number and email ID are already associated with an existing KDK Software account—either through a previous Sign-Up or usage of another KDK product.
If you are already registered and wish to use PDF Signer with the same mobile number and email ID, you do not need to create a new account.
Instead, please proceed by signing in directly using your registered mobile number and password.
Q. Which database is used in the software?
The PDF Signer software does not use any database at the software level. It simply takes the input PDF file, applies the digital signature, and generates the signed output PDF. No data is stored or managed in a database.
Q. What is the subscription period of the software?
The software is licensed on an annual subscription basis. This means that if you purchase the software today, the subscription will remain valid until the day before the corresponding date in the following year.
For example, if purchased on June 11, 2025, the subscription will be valid through June 10, 2026.
Your renewal will be due on the same date each year.
Q. Is there any limit to the number of PDF documents that can be signed?
Yes, the number of documents you can sign is determined by the plan associated with your subscription. Different plans may have varying limits on document signing volume.
Please refer to your selected plan details or contact our support team for specific limits.