PDF metadata is information stored about a document rather than the visible page content. Depending on the PDF software and workflow, metadata can include a title, author, subject, keywords, creator application and creation or modification dates.
Why PDF metadata matters
Metadata can help organize document libraries and identify where a file came from. It can also unintentionally reveal a person's name, company software or document history, which is worth considering before publishing a file.
How to view PDF metadata
- Open the PDF in a metadata viewer or document application.
- Inspect standard fields such as title, author and subject.
- Check creation and modification information.
- Review any additional producer or application fields.
Visible content is not the same as metadata
Removing a name from the visible page does not necessarily remove it from metadata. Conversely, changing metadata does not remove the name from text, comments, annotations or embedded files.
Metadata and privacy
Before sharing a document publicly, review metadata if the file originated from a personal or organizational workflow. Sensitive documents may contain more information than is obvious from the rendered pages.
Use a PDF metadata viewer
You can inspect common metadata fields with the Tervilo PDF Metadata Viewer.
Metadata can survive ordinary editing
Changing the visible document does not guarantee that older metadata disappears. Different applications can also write different fields. If privacy matters, inspect the final file rather than assuming that an earlier cleanup step was sufficient.
Use metadata as a clue, not proof
Metadata can help diagnose a workflow, but fields such as author or creation date may be inherited, automatically generated or changed by software. They should not be treated as definitive evidence of authorship or document history.
Practical example
Before publishing a company report, inspect the title, author, creator and modification fields. You may discover an employee name or internal software identifier that was never intended for public release. Metadata review does not replace removing sensitive visible content, but it can reveal another layer of information worth checking.
Common PDF Metadata Fields
PDF viewers may display several standard metadata fields. The exact fields available depend on how the PDF was created and which software is being used to inspect it.
Title and Subject
The Title and Subject fields can describe the document and help identify it in document-management systems. They may be blank, manually entered, or copied from information in the application that created the source document.
Author
The Author field may contain a person, organization, department or another value supplied by the software. It should not automatically be treated as proof of who wrote the document.
Creator and Producer
The Creator field commonly identifies the application used to create the source document. The Producer field can identify the software or library that generated or processed the PDF. These fields can be useful when troubleshooting document-conversion workflows.
Creation and Modification Dates
PDF metadata may contain creation and modification dates. These values can provide useful workflow clues, but they should not automatically be interpreted as proof of when the underlying content was originally written.
Keywords and Custom Fields
Keywords can help classify or search for documents. Some workflows also store additional custom metadata. Different PDF applications may expose different fields, so two viewers may not display exactly the same information.
Why PDF Metadata Can Differ Between Viewers
PDF software does not always expose or interpret metadata fields in exactly the same way. A field that is missing from one viewer may still contain related information elsewhere in the file. Metadata can also be added, changed or removed by different applications during the document workflow.
Metadata Is Not the Same as Document Sanitization
Clearing metadata does not automatically remove comments, annotations, hidden objects, embedded files or personal information visible in the document. Metadata review should therefore be treated as one part of a broader document-cleanup process.
What PDF Metadata Cannot Prove
Metadata alone cannot establish that a document is authentic, unchanged or written by the person named in an Author field. Important questions about authorship, authenticity or document history require broader evidence and verification.
Practical Metadata Review Checklist
- Check the Title and Subject fields.
- Review the Author field for unexpected personal or organizational information.
- Check Creator and Producer information.
- Review available creation and modification dates.
- Inspect Keywords and any available custom fields.
- Check the visible document for personal or confidential information separately.
- Inspect the final PDF after the last editing or export step.
- Do not treat metadata as definitive proof of authorship or document history.
Use the Tervilo PDF Metadata Viewer
For a quick browser-based inspection, use the Tervilo PDF Metadata Viewer to check common PDF metadata fields such as title, author, subject, creator, producer and available dates.
Metadata Sanitization and Privacy
Removing or changing visible document information is not the same as fully sanitizing a PDF. Metadata can include author names, application information, dates, titles, keywords and other properties that may reveal information about how a document was created or processed.
Before sharing a sensitive PDF, review its metadata and remove information that is not required by the recipient. For confidential documents, also inspect the document content, comments, annotations, attachments and other embedded information. Metadata review is one part of a broader document privacy check.
Why Metadata Fields Differ Between PDF Viewers
Different PDF viewers and operating systems may display metadata fields differently. Some applications expose only common fields such as title, author, creator, producer and dates, while other applications may show additional properties or technical information.
A field that is not visible in one viewer is not necessarily absent from the PDF. The application may simply choose not to display that property. For important investigations or document checks, compare the available metadata using a capable metadata viewer rather than assuming that one application shows every field.
What PDF Metadata Cannot Tell You
Metadata can provide useful clues, but it should not automatically be treated as proof of authorship, ownership, creation history or document authenticity. Metadata can be edited, copied, removed or changed when a file is processed by different applications.
For example, a creator name in the metadata does not by itself prove that the named person created the document. Likewise, a creation date may describe when a particular application created or saved a PDF rather than when the underlying information was originally produced.
Use metadata together with the document content, file history and other available evidence when a stronger conclusion is required.