Add Signatures

Foxit PDF Editor provides a simple but useful signing tool to let you sign a PDF document with your personal signature.

• Create a Signature
• Sign a Document
• Verify a Digital Signature (Subscription Required)
• View Signed Versions of a Digitally Signed PDF
• Add Certificates to the Trusted Certificates List
• Edit a Saved Signature
• Clear a Saved Signature

Create a Signature

• Tap Fill & Sign on the toolbar at the top;
• On the Fill & Sign toolbar, tap ;
• Do one of the following:
  • Tap  on the upper right corner on the toolbar to choose the color and thickness as desired, and draw your signature in the pane;
  • Tap  to insert an image of your signature from your device;
  • Tap  to use your camera to capture the image of your signature;

Before applying the signature, you can tap  to remove the signature, if necessary.

• (Subscription required) If you want to create a signature with a digital certificate, follow the steps below:
  • Tap;
  • Select a certificate from the list, input the password, and then confirm it.
  • Tap OK.
• Tap Save to save the signature.
• Tap  (iOS) or  (Android) to share your signature.

Tips:

• If you have created and saved signatures previously in Foxit PDF Editor, you should choose Create in the Signature List to create a new signature.
• To create a signature with a digital certificate in Foxit PDF Editor, you need to save the digital certificate on your device before creating the signature.

Sign a Document

• Tap Fill & Sign on the toolbar at the top;
• On the Fill & Sign toolbar, tap;
• (Optional) If you have created and saved multiple signatures, select the signature you want to add to the PDF file;
• Tap on the document where you want to add the signature to. If you haven’t saved a signature on the device previously, the Add Signature panel will appear. Please follow the steps in Create a Signature to create a signature first;
• If necessary, drag the corner handle to resize the signature, or drag the signature to move it to the desired location;
• Tap Sign (iOS) or Add Signature (Android) to apply the signature;
• (Optional) After adding the signature, you can tap  (iOS) or  (Android) on the toolbar at the top to share the signed PDF document.

Tip: Once applied, the signature cannot be edited or moved. The signature and all other changes made to the document will be saved. 

Verify a Digital Signature (Subscription Required)

If a PDF document contains a digital signature, you can verify the digital signature to ensure that it is valid. The steps are as follows:

• Open the signed PDF document with Foxit PDF Editor;
• On the document pane, do the following to open the navigation panel:
  • On tablets, tapon the toolbar at the top;
  • On phones, tapon the toolbar at the bottom;
• Tap  to open the Digital Signatures pane;
• Tap beside the digital signature, and choose Verify;
• The verification results will be displayed on the document pane. In the results panel, tap View Certificate to view the certificate.
• In the View Certificate dialog box, tap  beside the certificate, and choose one of the options:
  • Info: Check the detailed information about the certificate.
  • Trust: Add the trusted digital certificate to the Trusted Certificate list. Then all the digital signatures with the certificate will be validated as valid.

View Signed Versions of a Digitally Signed PDF

For a document digitally signed several times, all the digital signatures and their corresponding versions can be accessed from the Digital Signatures panel. To view the previous versions of a signed PDF, please follow the steps below.

• Open the signed PDF document with Foxit PDF Editor;
• On the document pane, do the following to open the navigation panel:
  • On tablets, tapon the toolbar at the top;
  • On phones, tapon the toolbar at the bottom;
• Tap  to open the Digital Signatures pane;
• Tap beside the digital signature, and choose View;
• The previous version will be opened in a new instance. To return to the original document, tap (iOS) or Close (Android).

Add Certificates to the Trusted Certificates List

When you validate or view properties of a digital signature, the validity status may display “unknown” or “could not be verified” if the certificate is not trusted. You can follow the steps below to add trusted certificates to the Trusted Certificates List.

• On the document pane, tap  on the toolbar at the top;
• Choose Protect > Trusted Certificates;
• Tap Add;
• Select the certificate, input the password, and tap OK.

Tip: Before adding a certificate to the Trusted Certificates List, you need to upload the certificate to Foxit PDF Editor or save it on your Android device.

Edit a Saved Signature

• Tap Fill & Sign on the toolbar at the top;
• On the Fill & Sign toolbar, tap;
• Tapbeside the signature that you want to edit, and choose Edit;
• Edit the signature in the pop-up panel as desired, and tap Save to save it.

Clear a Saved Signature

• Tap Fill & Sign on the toolbar at the top;
• On the Fill & Sign toolbar, tap;
• Tapbeside the signature that you want to delete, andchoose Delete.