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▤ DOCUMENT · PDF-METADATA-EDITOR

PDF Metadata Editor

View and edit a PDF's title, author, subject, keywords and producer fields.

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▤ WORKSPACE
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▤ NOTES & SPECIFICATION

The Personal Data Hiding in Your PDF — And How to Remove It

Every time you export a PDF from Microsoft Word, Google Docs, LibreOffice, or a scanner app, the software embeds metadata about the document and its creator. Some of this metadata is innocuous. Some of it is not. Common leakage:

  • Username and machine name: the Windows username of the person who created the document, sometimes including the computer's network hostname. This can identify an individual even after a company's name has been removed from the content.
  • Original file path: some converters embed the full path to the source file — revealing internal directory structures like C:\Users\jsmith\Confidential\Q3-layoffs-draft.docx.
  • Creation and modification timestamps: precise to the second, which can contradict statements about when a document was prepared. In legal proceedings, metadata timestamps have been used to impeach claimed document dates.
  • Software version: the producer field identifies the application and version that created the PDF, which can reveal patch levels and internal toolchains.

None of this information is visible by reading the PDF normally — but anyone who runs a metadata extractor (including this tool's read mode) can access it instantly.

What This Tool Changes — and What It Does Not

This tool edits the DocInfo dictionary embedded in the PDF — the standard metadata block containing title, author, subject, keywords, creator, producer, and timestamps. Clearing these fields removes the leakage described above from most PDFs.

It does not affect:

  • XMP metadata: some PDFs contain a parallel metadata block in XMP (Extensible Metadata Platform) format. pdfs created by Adobe tools often have both DocInfo and XMP in sync. This tool modifies DocInfo; if XMP is present, it may still contain identifying information. Acrobat Pro's "Sanitize Document" feature removes both.
  • Content streams: text in the page content (e.g., "Prepared by John Smith" typed in a header) is not metadata — it is page content and is not touched by this tool.
  • Hidden layers and form data: PDF layers and embedded form data are not part of the metadata dictionary.

Metadata for Discoverability — the Other Direction

While privacy is one reason to edit metadata, discoverability is the other. Google and Bing index PDF metadata when crawling documents published on websites. A PDF titled "Document1" with no keywords competes poorly in search against the same content with a descriptive title and relevant keywords in the subject field. For published white papers, research reports, or marketing materials, well-crafted metadata measurably improves search ranking.

How to Use This Tool

  1. Upload your PDF.
  2. The current metadata loads into editable fields.
  3. Modify or clear any field: title, author, subject, keywords.
  4. Click "Save Metadata" and download the updated PDF.
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▤ QUESTIONS
01 Can someone still identify me from a PDF after I clear the metadata with this tool? +

Potentially yes, through two routes: XMP metadata (a parallel format not all tools clear simultaneously) and content within the pages themselves (typed name, tracked changes, embedded fonts with author info). This tool clears standard DocInfo metadata. For maximum anonymization, also check for XMP and review page content.

02 Why does the "Creator" field show my Word version instead of my name? +

The Creator field records the application that generated the PDF, not the user's name. The Author field typically holds the username. Both are populated from the operating system and application at export time.

03 Does clearing metadata invalidate digital signatures? +

Yes. A digital signature covers the entire PDF byte stream. Any modification — including metadata changes — invalidates existing signatures. Metadata should be finalized before signing.

04 Does Google index PDF metadata for search rankings? +

Google indexes the title and content of PDFs. A descriptive title in metadata improves how the PDF appears in search results (it replaces the filename in the search snippet). Keywords in the DocInfo keywords field are largely ignored by modern search engines, which prefer content-based relevance, but the title and subject fields still provide useful signals.