What is a Tagged PDF?

A Tagged PDF contains hidden structural metadata (a StructTree) that defines reading order, headings, paragraphs, and tables, improving accessibility and data extraction.

Why compare extraction methods?

Many PDFs have poorly constructed or missing tags. Comparing the outputs reveals whether relying on the document's internal StructTree improves or degrades the extracted content.

Can I inspect specific pages instead of the whole document?

Yes, you can use the Pages input to specify a range, such as '1,3,5-7', to focus the analysis on specific sections and speed up processing.

What does the HTML report show?

The report displays a side-by-side comparison of semantic node counts, text differences, and how elements like headings, lists, and tables are recognized in both modes.

Does this tool modify my original PDF?

No, the tool only reads the PDF to extract and analyze its structure. Your original file remains completely unchanged.

Tagged PDF Inspector | Online Free Tool

Examples

1. Evaluating Brand Guidelines for RAG Ingestion

Data Engineer

Background

A data engineer is preparing a set of corporate brand guidelines for a RAG-based chatbot.

Problem

The PDF has complex layouts, and standard text extraction merges columns and loses heading hierarchy.

How to use

Upload the brand guidelines PDF, leave 'Include Header/Footer' unchecked, and run the inspector.

Pages: 1-10

Outcome

The report shows that StructTree extraction correctly identifies 20 semantic nodes with proper heading levels, whereas plain extraction yields 22 fragmented nodes, proving the tagged structure is beneficial for chunking.

2. Auditing Financial Reports for Accessibility

Accessibility Specialist

Background

An accessibility specialist needs to verify if a newly published annual report meets basic tagging requirements for screen readers.

Problem

It is unclear if the tables and lists in the PDF are properly tagged or just visually formatted to look like tables.

How to use

Upload the annual report PDF, specify the pages containing tables, and generate the comparison report.

Pages: 15-20

Tagged PDF Inspector | Online Free Tool | Elysia Tools

Tagged PDF Inspector

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Examples

1. Evaluating Brand Guidelines for RAG Ingestion

2. Auditing Financial Reports for Accessibility

FAQ

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