Free Toolkit

PDF Structure ViewerView internal structure and metadata of PDF documents.

PDF Structure Viewer illustration
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PDF Structure Viewer

View internal structure and metadata of PDF documents.

How to Use
1

Upload PDF

Drop your PDF file to analyze.

2

Explore Tabs

Switch between Document Info, Pages, and Form Fields.

3

Review

See detailed structure information.

What Is PDF Structure Viewer?

The PDF Structure Viewer provides a comprehensive look at the internal structure of your PDF documents. Explore three tabs: Document Info (file name, size, pages, metadata like title, author, creator, producer, creation and modification dates), Pages (per-page dimensions in points and inches, rotation angles), and Form Fields (field names and types). The tool gives you complete visibility into your document structure without needing desktop PDF software. Perfect for debugging, auditing, or understanding PDF files.

Why Use Our PDF Structure Viewer?

  • Three-tab organized information view
  • Per-page dimension and rotation details
  • Form field discovery and listing
  • Complete metadata display

Common Use Cases

Debugging

Inspect PDF structure when troubleshooting issues.

Auditing

Review document metadata and properties.

Development

Understand PDF structure for programming tasks.

Quality Check

Verify page sizes, metadata, and form fields.

Technical Guide

Uses pdf-lib to load and analyze PDF documents. Extracts metadata using getter methods (getTitle, getAuthor, etc.). Page information is obtained by iterating getPages and reading getSize and getRotation for each. Form fields are discovered using getForm().getFields() with error handling for PDFs without forms. Creation and modification dates are formatted using toLocaleString. Page dimensions are shown in both points and inches (divided by 72). Information is organized into tabbed interface.

Tips & Best Practices

  • 1
    Document Info tab shows all metadata
  • 2
    Pages tab reveals mixed page sizes
  • 3
    Form Fields tab helps understand fillable PDFs
  • 4
    Use with accessibility checker for complete analysis

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Frequently Asked Questions

QWhat information does this show?
File properties, metadata (title, author, dates), page dimensions, rotation, and form fields.
QCan I edit the metadata here?
This is view-only. Use PDF Metadata Editor to modify metadata.
QWhy are some fields showing dashes?
Dashes indicate the metadata field is not set in the PDF.
QWhat are point dimensions?
PDF uses points as units. 72 points = 1 inch. The viewer also shows inches.
QDoes this work with encrypted PDFs?
The tool attempts to load encrypted PDFs but some protection may prevent reading.

About PDF Structure Viewer

PDF Structure Viewer is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.