PDF Structure Inspector
Inspect PDF Internal Structure, Objects, Fonts & Trees
Drag and Drop PDF files here
Fast, 100% private in-browser processing. Your files never leave your device.
Examine internal PDF objects, xref tables, font dictionaries, outline trees, and stream encodings directly in your browser.
How to use PDF Structure Inspector
Upload PDF
Select any PDF file.
Explore Object Tree
Browse catalog dictionaries, page nodes, annotations, and metadata streams.
Debug & Validate
Inspect PDF version standards and detect structural errors.
Key Features & Capabilities
Deep Developer Inspection
Inspect raw COS objects, indirect references, and stream lengths.
Zero Cloud Parsing
Safe for inspecting proprietary document architectures locally.
Frequently Asked Questions
Who is the PDF Inspector for?
Developers, document engineers, and security analysts diagnosing PDF issues.
🔒 100% Client-Side Privacy Guarantee
OM PDF processes all documents entirely in your web browser memory using WebAssembly. Your files are never uploaded to any cloud server, preventing data leakage and guaranteeing total security for confidential documents.