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Thank you for your interest in Aspose.Words.
Aspose.Words supports the following file formats:
- Doc (import and export)
- Docx (import and export)
- Html (import and export)
- Mhtml (import and export)
- Odt (import and export)
- Rtf (import and export)
- WordML (import and export)
- Epub (export)
- Pdf (export)
- Text (export)
When you convert your document between Word formats (Doc, Docx, WordML, Rtf, Odt) form fields will be preserved and converted to corresponding fields in each format.
When you convert your document to HTML (MHtml or Epub, which are also html based formats), form fields will be converted to corresponding INPUT tags.
Regarding converting to PDF. Currently Aspose.Words supports two ways of PDF conversion: direct conversion (without using Aspose.Pdf) and legacy conversion Aspose.Words+Aspose.Pdf. See the following link for more information:
Unfortunately, during converting to PDF using new method, form fields are converted to plain text. This is issue #6798 in our defect database.
However, the old method allows converting Word form fields to PDF formfield. Please see the following link for more information:
As I described above, Aspose.Words does not support import of PDF format. However, you can use Aspose.Recognition to convert PDF document to Word document.
Hope this information could be useful for you.