PDF forms and signatures
Distinguish AcroForm fields, XFA forms, and digital signatures when inspecting a PDF workflow.
Continue with PDF Form Field Inspector, PDF Page Geometry Inspector · Reference
Not every blank is a field
AcroForm fields are structured interactive fields such as text boxes, checkboxes, radio groups, and dropdowns. A printed blank or a scanned form has no AcroForm field until a PDF editor adds one.
XFA forms use a different XML-based technology and are not the same as AcroForms. A tool that lists AcroForm fields can legitimately return none for an XFA document.
Signatures need separate verification
- A digital signature covers specific document bytes and can become invalid after edits.
- Field required/read-only flags describe form behavior, not signature validity.
- Use a dedicated PDF viewer or validation service for certificate trust and signature status.
References
Related tools
- PDF Form Field InspectorList PDF AcroForm field names, types, required flags, and read-only flags locally.
- PDF Page Geometry InspectorInspect PDF page rotation and page-box geometry locally.