PDF Security & Access Issues

Does Adobe Reader Mobile Support Certificate-Based Electronic Signatures?

Algirdas Jasaitis Oct 18, 2026 868 views

Question details

The user wants to know if they can apply an electronic signature using a digital certificate within the Adobe Reader mobile application on their smartphone or tablet.

Does Adobe Reader Mobile Support Certificate-Based Electronic Signatures?

Product: Adobe Reader Mobile
Device & OS: Android and iOS
Scenario: Attempting to securely sign a PDF document using a certificate-based electronic signature on a mobile device.
Observed behavior: The certificate-based electronic signature feature is currently unsupported in the Adobe Reader mobile application for both Android and iOS.

Before you start

Check whether your organization strictly requires a cryptographic certificate-based signature, or if a standard drawn or typed electronic signature (which is widely supported on mobile PDF readers) is sufficient for your document.

Solution 1Recommended

Use Adobe Acrobat on a Desktop Computer

Since the mobile app does not support certificate-based signatures, you can complete the task using the desktop version of Adobe Acrobat.

Certificate-based digital signatures require access to specialized digital ID files and cryptographic tools. While mobile apps currently lack this capability, desktop environments fully support these secure signing methods.

Transfer the Document

Send or sync the PDF document from your Android or iOS device to your Windows or Mac computer using cloud storage or email.

Open Adobe Acrobat Desktop

Launch the Adobe Acrobat Reader or Acrobat Pro application on your computer and open the transferred PDF file.

Apply Certificate Signature

Navigate to the 'Tools' menu, select 'Certificates', and click 'Digitally Sign' to apply your certificate-based signature using your configured digital ID.

Solution 2

Submit a Feature Request to Adobe

Request the addition of certificate-based signatures to the mobile app directly through Adobe's wish form.

Sign PDF Documents Easily on Mobile with WPS Office

While certificate-based digital signatures often require a desktop environment, WPS Office Mobile provides a highly efficient and seamless way to add standard electronic signatures, annotate, and manage your PDF files directly on your smartphone.

1. Open Your PDF: Launch WPS Office on your mobile device and open the PDF document you need to sign.
2. Access the PDF Tools: Tap the 'Tools' icon at the bottom of the screen and navigate to the 'Annotation' or 'PDF Edit' tab.
3. Create a Signature: Select the 'Signature' option. You can draw your signature directly on the screen using your finger or a stylus.
4. Place and Save: Tap on the document to place your signature, resize it as needed, and save your signed PDF file.

Easily draw, insert, and save standard electronic signatures on Android and iOSComprehensive suite to read, edit, annotate, and convert PDF documents on the goFully compatible with standard PDF formats, as well as Microsoft Word, Excel, and PowerPoint files

microsoft office alternative - wps office

Frequently Asked Questions

What is the difference between an electronic signature and a certificate-based signature?

An electronic signature broadly refers to any digital mark (like a drawn signature or typed name) used to indicate agreement. A certificate-based signature (or digital signature) uses a cryptographic digital ID to authenticate the signer's identity and ensure the document has not been altered.

Can I view a PDF with a certificate signature on a mobile device?

Yes, most modern mobile PDF readers, including Adobe Reader and WPS Office, allow you to open and view documents that have already been signed with a digital certificate on a desktop, even if you cannot apply a new certificate signature from the mobile app itself.

Will Adobe Reader mobile ever support digital certificate signatures?

Adobe representatives have indicated that adding certificate-based electronic signatures to the mobile application is in their pipeline for future enhancements. Users are encouraged to submit feature requests to receive notifications when it officially rolls out.

PDF Troubleshooting