Import and Export Annotations from XFDF Files in Java

XFDF is an XML-like standard from Adobe XFDF (ISO 19444-1:2016) for encoding annotations and forms. It’s compatible with Adobe Acrobat and several other third-party frameworks.

ℹ️ Note: XFDF has various limitations. In most cases, using PSPDFKit Instant JSON will result in a smaller file and better synchronization.

The PSPDFKit .NET Library supports both reading and writing XFDF files. The PdfDocument class contains importXfdf and exportXfdf methods you can use to perform these operations.

Importing XFDF

Below is an example showing how to import XFDF from a file. However, the DataProvider can be inherited from to implement custom readers for encryption:

document.importXfdf(new FileDataProvider("Assets/importXfdf.xfdf"));

Exporting XFDF

You can export annotations and form fields from a document to an XFDF file like so:

File file = new File("xfdfOutput.xfdf");
document.exportXfdf(new FileDataProvider(file), new HashSet<>(), new HashSet<>());

The second two parameters take in HashSets. The first states which annotations to export, and the second states which form field to export. By passing an empty HashSet, PSPDFKit assumes all annotations or form fields should be exported.

Much like the import XFDF, with the export XFDF, it’s also possible to inherit from WritableDataProvider to implement custom writers for encryption.

Exporting Annotations to XFDF via Adobe Acrobat

Adobe Acrobat can export annotations into XFDF. The export menu is part of the Comments tool and is accessed by opening the tool in the sidebar.

You can access the export function by clicking on the three dots and then choosing Export All To Data File.

  1. At the bottom of the page, choose Acrobat XFDF Files.

  2. Select the directory you wish to save the XFDF file to and name the file.

  3. Click save.

A successful export will result in a file with an .xfdf extension.

Importing Annotations to XFDF via Adobe Acrobat

The export function is part of the Comments tool and is accessed by clicking on its icon.

Click on the three dots to open the import menu, and then click on Import Data File.

Highlight the .xfdf file you wish to import and click Select.

The import function completes with the annotations being placed on the document.

Adobe Acrobat Error Conditions

Error Description Screenshot
Damaged/missing document body
Damaged/missing description tag
Missing document flag