That "anonymous" PDF probably has your name in it. Word, Google Docs and LibreOffice write Author, Creator, Producer, creation/modification dates and full XMP metadata into every PDF export. Anyone opening File > Properties (or Document Properties in Acrobat/Preview) sees it in two clicks.
The stakes are real: whistleblowers leaking documents, job seekers sending CVs while still employed, journalists protecting sources, students submitting blind-review papers, and lawyers sharing redacted files have all been identified through PDF author fields. Filenames like John-Smith-resume.pdf plus embedded authorship make deanonymization trivial.
- What leaks: Author, Creator (e.g. "Microsoft Word for Microsoft 365"), Producer (PDF engine version), Created/Modified timestamps, Keywords, embedded XMP packet, sometimes the original file path and logged-in account name.
- How to check: Acrobat/Reader: File > Properties > Description. Preview (Mac): Tools > Show Inspector. Or drop the PDF in the tool below — the preview lists every field found.
- Why Office settings are not enough: unchecking "personal information" helps future exports but never fixes files already saved, and Google Docs offers no author toggle at all — every Docs PDF says what it says.
- What else to scrub: tracked-change author initials baked into comments, hidden text layers under redactions (black boxes that copy-paste!), and embedded fonts carrying subset names.
Strip a copy, keep the original. After cleaning, reopen Properties and confirm Author/Creator/Producer are blank and dates show epoch. For maximum safety combine with a filename change and fresh timestamps — Vantawebs resets dates to epoch automatically. Background on document forensics: what metadata hides in files.
How Vantawebs cleans PDFs: it opens the document with PDF-Lib entirely in your browser, blanks Title/Author/Subject/Keywords/Producer/Creator, resets creation/modification dates, and deletes the XMP Metadata and Info catalog entries — then re-saves. Content pages are untouched.
Clean it now: drop your PDF below for a one-click wipe. Nothing uploads — critical for confidential documents — and batch mode handles whole folders of CVs or exhibits.
Related: metadata when selling files online · removing GPS from photos.
Beyond metadata — true redaction: black highlight boxes are not redaction; the text underneath copies, searches and leaks. For sensitive PDFs, use real redaction (Acrobat Pro Redact tool or PDF24's redaction), then strip metadata as the final step — redaction tools sometimes add their own producer stamps. Finish by renaming the file neutrally (report-2026-09.pdf, never jane-final-FINAL.pdf).