Inspect Form Field Properties - Free Online Browser Tool

Read form field names, values, flags, tooltips, and parent groups without changing the PDF.

A field inventory tells you what exists; a property inspection tells you why a form behaves the way it does. This read-only tool reports field names, types, tooltips, values, flags, visibility and group relationships without saving or changing the source PDF.

This inspect form field properties utility runs completely inside your web browser. Your document is opened locally and processed on your own device using JavaScript and WebAssembly, so your file is never uploaded to any server. There is no signup, no watermark and no limit on how many documents you can handle.

  • 100% client-side - files never leave your device
  • Instant processing, no upload wait
  • Works on desktop, tablet and mobile
  • Free forever, no account required

Common next steps: Inspect & List Form Fields, Rename Form Fields, Fill PDF Form Fields, Flatten Form Fields.

How to Use the Inspect Form Field Properties Tool

Four steps, and the whole thing runs locally on your own device.

  1. Load an AcroForm PDF

    Select the form and let the browser inspect its standard interactive field dictionaries locally.

  2. Review field properties

    Check names, types, tooltips, current and default values, required/read-only/hidden flags and parent groups.

  3. Choose an export

    Use JSON for automation, plain text for a quick review, or both files in one ZIP.

  4. Download the report

    The original PDF is never saved or modified; only the local report is downloaded.

Frequently Asked Questions

Does this change my form?

No. It is read-only and does not call the PDF save operation.

What is the difference from List Form Fields?

List Form Fields gives a compact inventory. This tool adds flags, tooltips, defaults, visibility, raw values and parent/group details.

Are XFA forms supported?

XFA is reported as unsupported or unknown. The inspector focuses on standard AcroForm fields.

Can calculated display values be evaluated?

No. The report records stored values and flags; it does not execute JavaScript calculations or formatting rules.

Is form data uploaded?

No. Inspection and report generation happen entirely in the browser.