This short tutorial shows PDF developers how to Java programmers can remove a digital signature from a PDF file using the Aspose Cloud REST API. The guide walks you through uploading the PDF to Aspose Cloud storage, checking for the signature field, deleting it, and then downloading the cleaned document. For more information about the PDF format, see the PDF file info page.

Prerequisite

• Create an account API credentials to delete a signature in a PDF
• Download the Aspose.PDF Cloud SDK for Java
• Set up a Java project with the above SDK

Steps to Delete a Signature from PDF using Java RESTful Service

1. Create an instance of PdfApi using your Client Secret and Client ID.
2. Define the name of the PDF and open it from the local file system.
3. Upload the local PDF file to Aspose Cloud using the UploadFile method.
4. Check if the signature field is valid and present in the uploaded PDF.
5. If the signature is valid, delete the signature field using the DeleteField operation.
6. After deletion, download the modified PDF and save it locally.

These steps outline the complete workflow for removing a digital signature from a PDF via the Java REST interface. First, the code uploads a local PDF to Aspose Cloud, verifies the presence of a specific signature, removes it if found, and finally retrieves the updated PDF.

Code to Delete Digital Signature from PDF using Java-based API

The snippet demonstrates how to delete a digital signature from a PDF using the Java RESTful service. You can skip the verification steps if you already know the signature field name. After the signature is removed, you may perform additional operations on the resulting PDF before saving it locally.

For information on adding a signature to a PDF, see the article Sign PDF using Java REST API.