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Add Text to PDF with Java REST API

Java PDF editing becomes effortless with the Aspose.PDF Cloud REST API. This tutorial shows you how to write a multi‑line paragraph onto a PDF document using the Java Low‑Code API, letting you customize each line and segment with independent formatting options. For more details on the PDF format, visit the PDF file info page.

Prerequisite

Steps to Edit PDF File with Java REST Interface

  1. Create a PdfApi object using your API key and App SID for adding text.
  2. Build a paragraph by defining the text lines and the rectangular area where the text will appear.
  3. Upload the target PDF file to Aspose Cloud storage.
  4. Invoke the PutAddText endpoint to write the paragraph into the PDF.
  5. Download the updated PDF file that now contains the new text.

These steps illustrate how to develop a PDF text editor with Java RESTful Service. First, create segments and text lines, then combine them into a paragraph. After uploading the source PDF, call PutAddText() to insert the multi‑line, multi‑segment paragraph.

Code to Write on PDF File with Java-based API

The sample program demonstrates editing a PDF using the Java REST API. You can control text alignment, font, color, strike‑out, underline, subscript, superscript, margins, wrapping mode, and many other properties. Specify the page number (starting at 1) where the text should be inserted.

If you need to strike through existing text in a PDF, see the article on Strike Through Text in PDF with Java REST API.

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