PDF Security & Access Issues

How to Digitally Sign a PDF Without Adobe Acrobat Pro

Amos GikundaAmos Gikunda Oct 28, 2026 869 views

Question details

The user wants to know if multiple organizations require an Adobe Acrobat Pro subscription to digitally sign and return a PDF document.

How to Digitally Sign a PDF Without Adobe Acrobat Pro
Product
PDF
Device & OS
not provided
Scenario
Distributing a PDF document to multiple organizations for digital signatures.
Observed behavior
Seeking clarification on software requirements for recipients to successfully sign a PDF.
Before you start

Ensure the PDF document you are sending out does not have restrictive security settings that prevent adding signatures or filling forms.

Solution 1Recommended

Sign the PDF Using Free Adobe Acrobat Reader

Recipients do not need a paid Acrobat Pro DC subscription; they can use the free Reader version to sign.

As long as the sender has prepared the PDF document for signing and hasn't locked it with restrictive permissions, any recipient can open and sign it using free software.

1
Download Acrobat Reader

Ensure the recipient has the free Adobe Acrobat Reader installed on their device.

2
Open the document

Launch the PDF file using the free Reader application.

3
Use the Fill & Sign tool

Click on the 'Fill & Sign' option in the right pane to add a signature to the document.

Sign the PDF Using Free Adobe Acrobat Reader
Cost-Effective: This method allows multiple organizations to collaborate and sign documents without purchasing additional software licenses.
Sign PDFs for Free with WPS Office

Easily Sign and Send PDFs with WPS PDF

WPS Office provides a comprehensive, free-to-use PDF tool that allows you and your organization to easily add digital signatures, fill forms, and share documents without expensive subscriptions.

  1. 1. Open the PDF: Launch WPS Office and open the PDF document you need to sign.
  2. 2. Access signature tools: Navigate to the 'Fill & Sign' tab or the 'Protect' tab on the top ribbon.
  3. 3. Create your signature: Click 'Sign' to draw, type, or upload an image of your signature.
  4. 4. Apply and save: Place the signature in the designated field, then save the document to finalize.
Free to add and manage PDF signaturesFully compatible with standard PDF formatsLightweight and easy-to-use interfaceCross-platform support for Windows, Mac, and mobile
microsoft office alternative - wps office

Frequently Asked Questions

Can I sign a PDF on my mobile device without a premium subscription?

Yes, many free PDF apps, including WPS Office and Adobe Acrobat Reader, allow you to draw or insert your signature on mobile devices for free.

Why can't the recipient sign the PDF I sent?

The document might have security restrictions enabled. Ensure that editing or form-filling permissions are allowed when saving and sharing the PDF.

Are digital signatures applied in free software legally binding?

Generally, yes. Standard electronic signatures added via reputable free software like WPS Office or Adobe Acrobat Reader comply with basic e-signature laws, though highly regulated industries may require specific certificate-based signatures.

How do I prepare a document so others can sign it for free?

Save your PDF as a standard document without password-protecting the editing features, or use a dedicated e-signature platform to send signature requests.