How to Remove Hidden Metadata from a PDF
A practical guide to stripping author, title, software, and revision metadata from PDFs before you publish or share them.
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Drop your PDF below to remove all hidden metadata and re-save a clean copy. The original file on disk is left untouched.
Strip PDF MetadataStep-by-Step Guide
- 1
Find out what metadata is in your PDF
Open the PDF in your reader and check File → Properties. You will usually see Author, Title, Subject, Keywords, the application that created it, and the creation and modification dates. Some PDFs also embed XMP metadata with revision history, the original filename, and even the network path the file was saved from.
- 2
Run the file through a metadata-stripping tool
Open the PDF in PDFMint's Protect tool and select the "Strip metadata" option. The tool rewrites the PDF's Info dictionary and XMP metadata stream so that author, title, creator, producer, and dates are blank or set to neutral defaults. The visual content and page layout are completely unaffected.
- 3
Re-check the cleaned file
Open the cleaned PDF and look at File → Properties again. Author, Title, and Keywords should be empty. Modification date will reflect the new save. For maximum cleanliness, you can also remove embedded thumbnails and the XML revision tree, both of which the tool handles automatically.
Tips
- Whistleblower-grade metadata stripping should also remove any embedded fonts that were subset under your account name, and any hidden cropped image regions. The full pipeline is: strip metadata → flatten → re-export.
- If you use Word or LibreOffice, set author name to a neutral value before exporting to PDF. This prevents your real name from being embedded in the first place, which is cleaner than stripping it after the fact.
- Photos converted to PDF carry over their EXIF metadata too — including GPS coordinates. Strip EXIF from the source images before converting to PDF if location data is sensitive.
Frequently Asked Questions
What metadata is actually in a typical PDF?
Every PDF has an Info dictionary with Author, Title, Subject, Keywords, Creator (the application), Producer (the PDF library), CreationDate, and ModDate. Most PDFs also have an XMP metadata stream with the same fields plus a UUID, revision history, and sometimes the original filename. Office-exported PDFs additionally embed the Word or LibreOffice version, the document template name, and occasionally the local username.
Can metadata identify me even if I publish anonymously?
Yes, frequently. Author fields, embedded font subset tags, and Office username metadata have de-anonymized whistleblowers and anonymous sources in several well-known cases. If you are publishing a sensitive document, stripping metadata before release is just as important as redacting the visible text.
Does stripping metadata affect the visible PDF content?
No. Metadata lives in the file's Info and XMP streams, which are separate from the page content stream. Removing metadata changes what appears in File → Properties but does not modify any visible text, image, or layout. The pages look identical before and after.
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