How to Fix PDF Hyperlinks Disappearing After Digital Signature
Question details
User needs to apply a valid digital signature to a PDF without disabling or removing the existing hyperlinks to embedded attachments.
- Product
- PDF Editor
- Device & OS
- not provided
- Scenario
- Applying a digital signature to a document that contains active hyperlinks to embedded files.
- Observed behavior
- Using standard Fill & Sign features causes hyperlinks to disappear or stop working, likely due to document flattening. Inserting an image of a signature preserves the links but does not provide a valid digital certificate.
Ensure you have a backup copy of the original, unsigned PDF file with the embedded hyperlinks intact before testing different signature workflows.
Use a Certificate-Based Signature Workflow
Standard Fill & Sign tools often flatten the document to secure it, which strips interactive elements. Using a proper certificate-based signature secures the file without unnecessarily removing hyperlinks.
Digital signatures are designed to certify and lock a PDF against tampering. Using the 'Certificates' tool rather than 'Fill & Sign' creates a cryptographic signature that is less likely to aggressively flatten the entire document structure.
Launch your PDF editor and open the original, unsigned version of your PDF that still contains the working hyperlinks.
Navigate to the Tools menu and select 'Certificates' (or 'Digital Signatures') instead of the basic 'Fill & Sign' option.
Click 'Digitally Sign', use your mouse to draw the signature box on the document, and select your digital ID certificate.
Click 'Sign' and save the document under a new name to preserve the original unsigned copy. Test the hyperlinks to ensure they remain active.
Update Your PDF Software
Older versions of PDF software, such as Acrobat 11, have known compatibility issues regarding links to embedded files after certification.
Securely Sign PDFs and Preserve Hyperlinks with WPS Office
WPS Office includes a powerful built-in PDF tool that lets you seamlessly add valid digital signatures and handle embedded file hyperlinks without unnecessarily flattening your interactive document features.
- 1. Open your PDF: Launch WPS Office and open your PDF document containing the active hyperlinks.
- 2. Navigate to the Protect tab: Go to the 'Protect' tab on the top ribbon to access the document security and signing tools.
- 3. Select PDF Signature: Click on 'PDF Signature' to create or insert a new signature securely into your document.
- 4. Apply and save: Place the signature in the desired location and save the file. Your document is now signed while preserving functional hyperlinks.
Frequently Asked Questions
Why do my PDF hyperlinks disappear when I use Fill & Sign?
The Fill & Sign tool often flattens the document to ensure the added text and signature cannot be altered. This flattening process inadvertently converts interactive elements, like hyperlinks and form fields, into static text.
Does adding an image of my signature act as a digital signature?
No. While inserting an image of your signature preserves document links because it does not lock or flatten the PDF, it is not cryptographically secure and does not constitute a valid, legally binding digital signature.
Can I edit a PDF's hyperlinks after it has been digitally signed?
Generally, adding a cryptographic digital signature locks the document to prevent tampering. If changes to hyperlinks or embedded files are needed, you must go back to the original unsigned version, make your edits, and sign the document again.
