How to remove hidden metadata from PDFs and Office files
Before you send a contract, report or spreadsheet outside your company, check what the file says about you that the page does not. This guide lists what is usually hidden and how to find and remove it yourself.
What is usually hidden in a file
- Document properties: author, last modified by, company, title, creation and edit dates, and the software used. PDFs keep these in the Info dictionary and in an XMP block; Office files keep them in the docProps folder inside the zip.
- Comments and tracked changes in Word, and comments or notes in Excel and PowerPoint. Deleted text can remain in the file until the changes are accepted.
- Hidden content: hidden sheets, rows and columns in Excel, and speaker notes in PowerPoint.
- Links and embedded items: links to files on a network share or a local path can reveal folder names and user names.
Check it yourself
- In Word, Excel or PowerPoint on Windows, open File, then Info, then Check for Issues, then Inspect Document. It lists what it finds and offers to remove each category. Run it on a copy, because some removals cannot be undone.
- For a PDF, open the document properties in your PDF reader to see the visible fields. These are not the whole picture, because the XMP block and form fields are not always shown.
- Save the cleaned result under a new name and open it again to confirm the properties are empty.
Where doing it by hand gets slow
The inspector works one file at a time and does not cover every category in every format. For a folder of twenty files, or when you need written evidence of what was removed, a batch job is faster.
What we do
Send up to 25 PDF, DOCX, XLSX or PPTX files. You get clean copies and a written report per file listing what hidden data was present, what was removed and what was left in place. It is an AI-assisted process with automated checks, not a human review, and it is not legal or compliance advice.
See the service and what is not covered
Written by Hexloom Labs with AI assistance. Not legal, tax or accounting advice. Check the steps against your own software version.