How to Remove PDF Metadata

A PDF carries metadata — document properties that describe who made it, when, and with what tool. This information is invisible on the page but trivial to read: every major PDF viewer has a "Document Properties" dialog that shows it. Removing metadata before you share a file is a basic privacy step, like checking the back of a photograph before posting it. This guide covers what PDF metadata exists, what it can reveal, and how to clear it locally with IXPDF.

What metadata a PDF can carry

The PDF spec defines a document information dictionary with several standard fields. Most PDF writers populate at least some of them automatically.

• Title — the document title. Often copied from the source file's name or the title set in the authoring app.
• Author — the author. Frequently set to the operating system user name or the value from the authoring app's preferences. This is the field most likely to leak a real name.
• Subject — a short description. Sometimes set by the source app, sometimes empty.
• Keywords — search keywords. Usually empty unless the author set them.
• CreationDate — when the PDF was created, to the second. Reveals the exact moment the document was exported.
• ModDate — when the PDF was last modified. Reveals the time of the most recent edit.
• Producer — the PDF library that wrote the file (e.g., "pdf-lib", "Adobe PDF Library 17.0", "macOS Quartz PDFContext"). Reveals what tool was used.
• Creator — the authoring application (e.g., "Microsoft Word", "Google Docs", "Adobe InDesign 2024"). Reveals the source app and sometimes its version.

Beyond the information dictionary, a PDF can also carry XMP metadata (an XML block embedded in the file), custom metadata streams, and embedded fonts that name their creator. The standard fields above are the most common and the easiest to clear.

Why remove metadata?

Metadata can reveal more than you intend. A contract drafted in Word by "Jane Doe" on a company laptop, exported to PDF, and sent to a counterparty carries Author: Jane Doe andCreator: Microsoft Word in the PDF — even if the document body shows only a company name. A whistleblower leaking a report should not ship a PDF whose Author is their real username. A lawyer sending a redacted filing should strip theProducer and Creator that might identify the redaction tool and version.

Clearing metadata is not a substitute for redacting visible content — it is a separate step that prevents the file's properties panel from leaking information about the document's origin.

Step-by-step: remove metadata with IXPDF

1. Open /tools/edit-metadata/ in your browser.
2. Drop in your PDF (or click to choose a file). The file is read into memory locally — it is not uploaded.
3. The tool shows the current Title, Author, Subject, and Keywords.
4. Clear any field you do not want to share. You can also replace a field with a generic value (e.g., set Author to your organization's public name instead of your personal name).
5. Click Run Edit Metadata. The tool writes a new PDF with your values.
6. Download the cleaned PDF. Open it in any viewer and checkDocument Properties to confirm the fields are empty or set as you intended.

Full sanitization: clearing Producer, Creator, and dates

To strip fields IXPDF does not yet expose, you have two local options. With qpdf:qpdf --empty input.pdf --pages input.pdf 1-z -- output.pdfrewrites the file and drops some metadata; combine with--linearize=no for a clean rewrite. Withexiftool (if installed):exiftool -all= -overwrite_original input.pdf clears all metadata tags exiftool knows about, including XMP. Both run locally.

A more thorough sanitization also removes embedded thumbnails, hidden layers, and embedded file attachments — that is closer to what Adobe Acrobat Pro's "Sanitize Document" feature does. For most everyday sharing, clearing the standard fields is enough.

What metadata does not reveal

Clearing metadata does not hide the document's visible content, the fonts it uses, or the fact that it is a PDF. It also does not remove text that has been visually redacted but is still in the content stream — true redaction removes the text, not just covers it. If you need to redact visible text, that is a different operation from metadata removal.

Common mistakes

• Clearing metadata after sending. Once the file is sent, the recipient already has the original metadata. Strip before sharing.
• Assuming "Save As" clears metadata. Re-saving preserves the metadata; some apps even add their own.
• Forgetting that file names also leak. The PDF's metadata can be clean, but if the file is namedJane-Doe-Contract-Draft-3.pdf the name itself reveals information. Rename before sharing.
• Trusting "online metadata remover" sites with sensitive files. Use a local tool. The whole point is to not upload the file.

Make it a habit

If you share PDFs regularly — contracts, reports, submissions — build metadata stripping into your pre-send checklist. The five seconds it takes to clear the Author field is much cheaper than explaining why an internal document leaked a colleague's username. Once it is a habit, you stop thinking about it.