PDF Form Fields
List every interactive form field in a PDF — name, type, required/read-only flags, and current value where present. Read-only inspection; use Flatten PDF Form to lock the values in.
About PDF Form Fields
PDF Form Fields reads the interactive AcroForm structure inside a PDF and lists every field it finds, including the field name, type, required and read-only flags, and any value already present. It's a read-only inspection tool, ideal when you need to understand a form's structure before filling, scripting, or flattening it. Everything is parsed in your browser, so the PDF is never uploaded.
- Category
- Input
- Accepts: application/pdf.
- Output
- Outputs: application/json.
- Cost
- Free, runs in your browser
- Memory
- low
Common uses
- Audit a vendor's PDF form to learn the exact field names before automating fill-in from a script
- Check which fields are marked required or read-only before sending a form to be completed
- Confirm a fillable form actually contains AcroForm fields rather than just printed lines
- Pull the current values out of an already-filled form for review or data entry into another system
- Diagnose why a form behaves oddly by listing its field types (text, checkbox, radio, dropdown)
- Document a form's field inventory before deciding what to flatten or redact
Frequently asked questions
What format does this accept and return?
It accepts a PDF (application/pdf) and returns JSON describing each form field: name, type, flags, and current value where one is present.
Does it modify my PDF?
No. This is read-only inspection. It reports on the form fields without changing the document in any way.
Is my PDF uploaded to a server?
No. The form structure is parsed locally in your browser, so neither the file nor its field values leave your device.
What if the PDF has no form fields?
The result will simply contain no fields, which is a useful signal that the document is a flat PDF with no interactive AcroForm.
How do I lock these values in once I'm done inspecting?
Use Flatten PDF Form. It converts the listed fields into static page content so the values can no longer be edited.
Keywords
- form
- fields
- inspect
- acroform
- list