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Extract data from PDF forms using Flutter

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Nutrient Flutter SDK enables you to extract data from form fields programmatically. Each form field has a fully qualified name that identifies a specific form field object before you extract its data.

Get the fully qualified name of a form field

The following example gets the fully qualified name of the first form field on the first page of a document:

final fields = await controller.document.forms.getFormFields();
// Get the fully qualified name of the first form field.
final String? formFieldName = fields.first.fullyQualifiedName;

Get the data from a form field

The following example gets data from a form field with the fully qualified name formFieldName:

// Get the data from a form field with the fully qualified name, `formFieldName`.
String? lastName = await controller.document.forms.getFormFieldValue('formFieldName');

Get form field properties

You can also get form field properties with the getFormFields method on the forms manager. It returns a list of typed PdfFormField objects. Each object exposes the most common form field properties, which you can use to validate form fields and extract additional data:

final formFields = await controller.document.forms.getFormFields();


for (final formField in formFields) {
  print('Field name: ${formField.fullyQualifiedName}');
  print('Field readOnly: ${formField.isReadOnly}');
  print('Field required: ${formField.isRequired}');
}