List PDF Form Fields
Extract and review all internal field names and types from an AcroForm PDF.
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Understanding the AcroForm Dictionary
Interactive PDFs contain an interactive form dictionary called AcroForm. This dictionary contains a /Fields array referencing widget annotations.
When building automated systems or trying to understand why a form is failing to submit data, it is crucial to inspect the exact internal names of these fields (e.g., 'Text1', 'chk_agree'). Our tool lists them instantly.
Technical Details
| Field Type | Internal Name | Common Uses |
|---|---|---|
| Tx | Text Field | Names, addresses, input |
| Btn | Button | Checkboxes, radio buttons, submit buttons |
| Ch | Choice | Dropdown menus, list boxes |
| Sig | Signature | Digital signature fields |
Next Step: List PDF Form Fields (Next Article)
Common Mistakes
- Assuming the visible label next to a field is its internal programmatic name.
- Trying to automate filling without mapping the exact field hierarchy.
Cross-Reference & Links
- Fill & Flatten Tool
- Merge PDFs
- Split PDF
- Rotate Pages
- Remove Pages
- Extract Pages
- Metadata Inspector
- Edit Metadata
- List Form Fields
- Add Page Numbers
- Why Flatten PDFs?
- PDF Security Guide
- Browser Processing
- Fixing Corrupted Forms
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Frequently Asked Questions
Can I edit the field names here?
Currently, this tool only lists them for inspection.
Does it show hidden fields?
Yes, all fields in the /Fields array are listed, regardless of their /Subtype visibility flag.