Whether you are a graphic designer sending artwork to commercial offset printers, a legal professional auditing confidential contracts for hidden author metadata, or a web developer optimizing document loading speed, knowing what is hidden inside a PDF file is critical. Standard PDF viewers often conceal crucial technical details like exact page bounding boxes, font embedding ratios, user permission bitmasks, and raw XMP packets.

To solve this, RiazHub developed the free PDF Properties Viewer & Deep Preflight Document Inspector  a powerful, 100% browser-based utility that extracts and audits full PDF object dictionaries instantly.

Analyze Your PDF Files Instantly Online

Inspect metadata, verify font embedding, check print readiness, and audit security permissions in complete privacy.

Launch PDF Properties Viewer Tool →

Why Perform a PDF Preflight Inspection?

PDF (Portable Document Format) is not just a digital piece of paper; it is a complex container of binary streams, font tables, graphics operations, and metadata streams organized into object dictionaries (such as /Info, /Root, and /Encrypt). Before releasing a document publicly or sending it to a commercial printing press, performing a deep preflight check prevents common pitfalls:

  • Preventing Font Substitution Errors: Unembedded fonts in commercial printing lead to missing glyphs, altered typography, or printing failure. Preflight inspection checks whether fonts are 100% embedded or subset.
  • Protecting Sensitive Confidential Data: Authors often unknowingly leak internal file paths, creator applications, original creation dates, and hidden XMP metadata tags in public PDFs.
  • Verifying Commercial Print Boundaries: Ensuring that CropBox, TrimBox, and BleedBox parameters match offset printing specs prevents text cropping during guillotine trimming.
  • Optimizing Web Streaming Speed: Checking if the PDF is Linearized (Fast Web View enabled) determines whether web browsers can begin rendering page 1 immediately without downloading the entire file first.

Key Modules of the PDF Preflight & Properties Inspector

When you inspect a file using the online PDF Properties Inspector, the tool processes the document structure and categorizes the inspection into 5 comprehensive analysis tabs:

1. Document Description & General Metadata

Extracts standard attributes from the PDF /Info dictionary, including Title, Author, Subject, Keywords, Creator Application (e.g., InDesign, Microsoft Word, LaTeX), PDF Producer engine, Creation Date, and Modification Date. It also evaluates PDF specifications from PDF 1.0 to PDF 2.0 (ISO 32000-2).

2. Security & Access Permissions Matrix

Inspects the /Encrypt dictionary bitmask flags (ISO 32000-1) to evaluate exact user and owner security restrictions:

Permission Flag Bitmask Index Description
Printing Content Bit 3 & Bit 12 Controls low-resolution and high-quality printing capabilities.
Content Copying Bit 5 Determines if visitors can extract text, images, and graphics.
Document Modification Bit 4 Controls page insertion, deletion, rotation, and content editing.
Form Filling & Annotating Bit 6 & Bit 9 Grants rights to add comments, sign digital forms, or fill AcroForm fields.

3. Page Geometry & Dimension Specifications

Calculates exact page dimensions across multiple industry standard units:

  • Millimeters ($\text{mm}$): $\text{pt} \times 0.352778$
  • Inches ($\text{in}$): $\text{pt} / 72$
  • Pixels at 72 / 150 / 300 DPI: High-resolution raster dimensions for web display and offset print media.
  • Bounding Box Table: Analyzes MediaBox, CropBox, BleedBox, TrimBox, and ArtBox.

4. Audited Embedded Fonts & Typography

Scans all drawing operators and font objects (`/Font` subtype dictionaries) to list font family names, encoding standards (WinAnsiEncoding, Custom, Identity-H), and embedding status (Embedded Subset `ABCDEF+FontName` vs Fully Embedded).

5. Technical Structure & Raw XMP Metadata Packet

Detects WCAG / PDF-UA Tagged Accessibility compliance (/MarkInfo), AcroForm interactive form counts, embedded file attachments (/EmbeddedFiles), embedded JavaScript payload actions (/JavaScript), and renders the raw XML packet stream from the Extensible Metadata Platform (XMP).

🔒 100% Client-Side Privacy Guarantee

Unlike cloud-based PDF conversion tools, RiazHub’s PDF Properties Inspector processes all PDF byte arrays directly in your web browser’s local sandbox memory using client-side JavaScript libraries (pdf-lib and pdf.js). No PDF files, confidential contracts, or financial documents are ever transmitted over the network or stored on external servers.

How to Inspect a PDF File Step-by-Step

  1. Open the PDF Properties Viewer & Preflight Tool on RiazHub.com.
  2. Drag and drop your PDF document into the designated upload dropzone, or click Select PDF Document to browse files from your computer or mobile device.
  3. Review the Document Health Scorecards for instant metrics on Web Optimization, WCAG Accessibility, Print Readiness, and Security Risks.
  4. Navigate through the 5 comprehensive tabs to inspect General Description, Security Perms, Page Geometry, Fonts Table, and XMP XML Metadata.
  5. Click Export Report (JSON) or Export CSV / TXT to download a structured technical audit report, or click Print Summary Sheet to generate a clean PDF properties printout.

Frequently Asked Questions (FAQ)

Q: Is my PDF file uploaded to RiazHub’s servers during inspection?

A: No. All parsing, font auditing, geometry calculations, and metadata extraction occur 100% inside your browser using JavaScript. Your files never leave your device.

Q: Can I inspect password-protected or encrypted PDF files?

A: Yes. The tool reads header bitmasks and evaluates encryption status (AES-128/256) even for restricted documents.

Q: How do I export the document properties report?

A: Use the action toolbar at the bottom of the tool workspace to download JSON files, CSV spreadsheets, copy formatted text to your clipboard, or print a formatted summary sheet.

Ready to Inspect Your PDF Documents?

Access the free preflight inspector tool now on RiazHub.com.

Open PDF Properties Viewer →