What your PDF says behind your back
Most PDFs carry a hidden record: the author field often holds a real name pulled from a Windows or Office account, the creator field names the software and version used, and timestamps record when the file was made and last modified. Harmless — until it isn't. An anonymous report with the whistleblower's name in the author field. A "final" proposal whose modification date shows it was edited an hour after the meeting. A tender document revealing which agency actually wrote it. This tool shows you those fields first, then hands you a copy with them gone.
How the cleaning works
Drop a PDF and its document metadata is displayed — title, author, subject, keywords, creating software, PDF producer, and both timestamps. The cleaned copy is built by copying every page into a brand-new document: the metadata containers themselves are left behind, including the XMP block, a second, less-visible metadata store that simple field-clearing tools miss. Page content is copied without re-rendering, so quality and selectable text are untouched. One disclosed side effect: document-level extras like navigation bookmarks and file attachments don't travel to the new copy either.
Inspected locally — the only sensible way
Uploading a document to a server to remove identifying information is a contradiction. Here the inspection and the cleaning both run in your browser: the PDF is parsed on your machine, the cleaned copy is assembled on your machine, and nothing about the file is transmitted anywhere. Note the honest limit — this cleans document metadata, not content. A name typed on the page, or hidden text a bad redaction left behind, is content; for blacking out on-page information, use a proper redaction tool.