How to protect a signature in a PDF document?

To keep your electronic signature safe, you should always protect the document from editing. Open the PDF document with Adobe Acrobat Pro/Reader DC or XI application. On the right side, click “Protect” to open the “Protect” options. Click on “Protect Using Password” option.

How to add signature in PDF using Foxit Reader?

Choose Protect > Sign & Certify > Place Signature. Press and hold the mouse button down, and drag to draw a signature field for your signature. In Sign Document dialog box, choose a digital ID from drop-down menu.

How do I add security to an Adobe PDF?

Open a file in Acrobat and choose “Tools” > “Protect.” Select whether you want to restrict editing with a password or encrypt the file with a certificate or password. Set password or security method as desired. Click “OK” and then click “Save.”

How do I add a security signature to a PDF?

To add a digital signature to a PDF in Acrobat, users can take the following steps: Open the PDF document in Adobe Acrobat. Click on the Tools tab in the top menu bar and select Fill & Sign. Click Sign Yourself > Add Signature. Drag and resize the signature so it appropriately fits in the document.

How to password protect a PDF with digital signature?

Add a password to a PDF Open the PDF in Acrobat. Do any of the following: Go to All tools > Protect a PDF > Protect with password. In the Protect Using Password dialog box, select if you want to set the password for viewing or editing the PDF. Type and retype your password. Select Apply.

How do I add a secure signature to a PDF?

To add a digital signature to a PDF in Acrobat, users can take the following steps: Open the PDF document in Adobe Acrobat. Click on the Tools tab in the top menu bar and select Fill & Sign. Click Sign Yourself > Add Signature. Drag and resize the signature so it appropriately fits in the document.

How to verify digital signature in Foxit Reader?

By default, Foxit Reader will verify signatures when the document is opened. If you want to change the setting, please go to File > Preferences > Signature, and uncheck the Verify signatures when the document is opened option in Signing & Verifications group.

How do I manage signatures in Foxit?

Manage Signatures Click Add to create signatures and initials. Click the Edit or Delete icon to edit or delete existing signatures. Click the Upload icon to upload the signature to Foxit eSign server. Please note that Foxit eSign server only saves one group of signatures (full name and initials).

Home
Functionality index

Switch from Foxit Reader to pdfFiller for a Add Signatures into PDF Solution For Free

Drop document here to upload

Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT

Based on 12500+ reviews

Last updated on Dec 28, 2025

Document creation is just the beginning

Learn more about security

Create and edit documents with a trusted solution

Try easy-to-use tools for all your document management needs.

Upload your document

pdfFiller scores top ratings on review platforms

This is a really great PDF convertor. Very easy to use. The best I have seen. A very good find. I would recommend especially to fill out government documents that could be rejected because of bad handwriting.

MARK M

So easy to use and meets all my expectations Knowing that it's there when I need it. I only use it when I get a new tenant. It also saves my information so I don't have to enter it each time. I can find any form that I need. I own a small rental business and I am able to fill out my lease and Pd filler saves it and I can fill out the next with just changing the new lease's name and address.

Kathryn H.

What do you like best? Easy to use and updates my pdfs in minutes. Great for filling out forms and digitally signing documents in a remote working environment. What do you dislike? While there are tools to keep text boxes aligned, it could be a bit stronger when filling out forms. What problems is the product solving and how is that benefiting you? PdfFiller is a great tools for remote working. It solves issues with filling out forms, signed documents and much more when an employee does not have access to a printer or scanner.

Verified User in Apparel & Fashion

Great software for the money Great software for the money. Has helped tremendously with our business needs. The only thing I would change is the LinktoFill. This gets confusing due to saving a file when you make updates to it and then you end up with having the two files. there should be an option to update exsiting file. Besides that, great program.

Tony

I have used it several times and it works great! I like the eSign feature that allows me to create important documents and sned them via email to get signed.

Jose

YOU ARE FREE AND EASY TO USE YOU ARE FREE AND EASY TO USE. I've yet to be disappointed with any of the features in this app. Thank you for offering a free tool that gives me everything I need to manage PDFs!

Happy Customer

Show more Show less

Watch pdfFiller eSignatures in action

Check out a quick video tutorial that shows how to create and place your signature or send a document for signing.

Related features

Create and edit documents with a trusted solution

Try easy-to-use tools for all your document management needs.

Upload your document