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Add Page Numbers in PDF using Java REST API

Learn how to add page numbers to a PDF using the Java REST API. This tutorial walks you through automatically stamping page numbers in a PDF document with the Aspose PDF Cloud SDK for Java and shows how to customize the stamp’s appearance via the SDK’s configurable properties.

Prerequisite

Steps to Add Page No to PDF using Java REST Interface

  1. Initialize the PdfApi client with ClientKey and ClientId
  2. Set the inputPdf and outputPdf file names for use in the application
  3. Read and upload the input PDF file to the Cloud storage
  4. Configure PageNumberStamp with margins, alignment, and starting number
  5. Call the PostDocumentPageNumberStamps() method to apply numbering to all pages
  6. Download the updated PDF with page numbers and save it as a PDF

These steps summarize how to insert Page No in PDF using Java RESTful Service. Upload the source PDF file to the Cloud storage, create a pageNumberStamp object and set the parameters of the stamp, and call the PostDocumentPageNumberStamps() method to insert Page Number on all the pages. Finally, if no error is raised, download the updated PDF file in the Cloud and save on the disk.

Code to Insert Page Number in PDF using Java-based API

This example shows how to add page numbers to a PDF using the Java Low‑Code API. You can also customize the stamp—adjust its opacity, rotate it, and fine‑tune indentation settings. The rotation enum supports 0, 90, 180, and 270 degrees.

In this tutorial we walked through adding page numbers to an existing PDF using the Java REST API. If you also need to transform GIF images into PDFs, check out our guide Convert GIF to PDF using Java REST API and explore the detailed GIF format information.

With the Java REST API—or its Low‑Code counterpart—you can quickly and reliably add page numbers to any PDF, streamlining your document workflow. Keywords: add page numbers in PDF using Java REST API; page number in PDF using Java Low Code API.