How to View and Edit PDF Metadata

What Is PDF Metadata?

Every PDF file contains two layers of information: the visible content (text, images, layout) and hidden metadata — information about the document itself. This metadata is embedded in the file and typically invisible when you open the document, but it can be read by software, search engines, and anyone who checks the file properties.

Standard PDF metadata fields include:

Beyond these standard fields, PDFs can also contain XMP (Extensible Metadata Platform) data — a more extensive XML-based metadata format that can include copyright information, location data, version history, and custom fields.

Why Metadata Matters

Privacy

Before sharing a PDF publicly or sending it to clients, check the metadata. You may not want recipients to know:

• The original author's name or organisation
• The creation date (which reveals when work started)
• The software used (revealing internal systems)
• Revision history

Document Management

Proper metadata makes documents searchable in document management systems (DMS). A PDF with a correct title, subject, and keywords will surface in searches; one with no metadata or the wrong title is effectively invisible.

Search Engine Optimisation

Search engines index PDF metadata. A PDF published on your website with a proper title and keywords ranks better than one with no metadata or a generic title like "Document1".

Legal and Compliance

Some document standards (particularly PDF/A) require specific metadata fields to be present and correct.

How to View PDF Metadata

In Adobe Acrobat Reader (Free)

1. Open the PDF
2. File → Properties (or Ctrl+D)
3. Click the Description tab

You will see Title, Author, Subject, Keywords, Creator, and Producer fields, plus creation and modification dates.

In Google Chrome

1. Open the PDF in Chrome
2. Right-click → Document Properties (in some versions, this is under the three-dot menu → More tools)

In File Explorer (Windows)

1. Right-click the PDF file → Properties
2. Click the Details tab

This shows basic metadata pulled from the PDF without opening a viewer.

Using ExifTool (Command Line)

ExifTool is the most comprehensive free metadata reader/editor:

exiftool document.pdf

This outputs every metadata field, including XMP data.

How to Edit PDF Metadata

Using ToolsofPDF

1. Go to PDF Metadata
2. Upload your PDF
3. Edit the Title, Author, Subject, Keywords, and Description fields
4. Click Save
5. Download your updated PDF

This is the quickest way to edit standard metadata fields without any software installation.

Using Adobe Acrobat Pro

1. Open the PDF
2. File → Properties (Ctrl+D)
3. Click the Description tab
4. Edit the fields directly
5. Click OK
6. Save the file (Ctrl+S)

Acrobat Pro also lets you edit XMP metadata: File → Properties → Additional Metadata.

Using ExifTool

exiftool -Title="Annual Report 2024" -Author="Finance Department" -Subject="Financial Summary" document.pdf

ExifTool is particularly useful for batch editing metadata across many files:

exiftool -Author="Acme Corporation" *.pdf

How to Remove PDF Metadata (for Privacy)

Using Adobe Acrobat Pro

The most thorough removal method:

1. Tools → Redact → Sanitize Document

This removes all metadata, embedded content, scripts, hidden layers, and embedded thumbnails in one operation.

For metadata only:

1. File → Properties → Description
2. Clear each field manually
3. Save

Using ExifTool

exiftool -all= document.pdf

This removes all metadata from the file. The original is saved as document.pdf_original automatically.

XMP Metadata vs Document Properties

Most tools edit the document properties (the older "DocInfo" metadata format). PDFs may also contain XMP metadata — an XML packet embedded in the file that can contain more fields and is used by Adobe products and many workflows.

If you edit document properties but not XMP, a tool that reads XMP may still see the old values. For complete metadata removal, use Adobe Acrobat's Sanitize Document feature or ExifTool's -all= option, which handles both.

Best Practices for PDF Metadata

For publicly shared documents:

• Set Title to the document's actual title (will appear in browser tab and search results)
• Set Author to your organisation name (not a personal name unless appropriate)
• Set Keywords to relevant search terms (comma-separated)
• Remove Creator and Producer if you don't want to reveal your internal toolchain

For internal documents:

• Include Author, Subject, and Keywords for document management
• Use consistent naming conventions so search works reliably across your DMS

For submitted documents (legal, government):

• Check whether the recipient's requirements specify metadata fields that must be present
• Strip all metadata if submitting anonymously or in blind review contexts

Frequently Asked Questions

Can metadata affect PDF file size? Minimally. Metadata is text-based and typically adds only a few kilobytes, even with extensive XMP data.

Will editing metadata change the visible document? No. Metadata is stored separately from the document content. Editing it does not change any visible text, images, or layout.

Can I recover deleted metadata? Not directly from the file after deletion. If the file was version-controlled, earlier versions may still have the metadata.

Do search engines index PDF metadata? Google indexes the PDF's title tag (from metadata) and uses it as the page title in search results. Keywords metadata has less influence than body text, but the title is significant.

Summary

PDF metadata is invisible to readers but important for privacy, searchability, and compliance. Use ToolsofPDF's Metadata editor for quick field updates, Adobe Acrobat Pro for full control, and ExifTool for command-line or batch operations. Always review metadata before publishing PDFs publicly — and use Sanitize Document in Acrobat when you need to guarantee complete removal.