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DOCX
Up to 100 files at once. Mixed formats are fine.
They convert one after another and download together as a ZIP.
Removing metadata from a Word document clears the author, whoever last saved it, the company, the template it came from, the revision number and the total editing time — a running count of how long the document has been open across its whole life. The text and formatting are untouched. Drop a .docx above; it is rewritten in your browser.
A .docx is a ZIP archive, and two small files inside it hold the properties. One has the author, the person who last saved it, the title, the revision number and both timestamps. The other has the company, the manager, the application that wrote it, the template it was based on, and the total editing time.
That last field surprises people. It is a cumulative count of minutes the document has been open for editing, across every session since it was created — a number that says whether a submission took four hours or four minutes.
A document built from an organisation's template names that template, which names the organisation — including when the document was meant to look like it was drafted from scratch. The company field is filled from the Office installation and follows the file wherever it goes.
The "last saved by" field is the one that causes trouble most often. A document drafted by one person, reviewed by another and sent by a third names all three to anyone who opens the properties dialog, which is a longer answer than most senders intended to give.
Tracked changes and comments. They live in the document body rather than in its properties, so they survive — and they name their authors. Accept or reject them and delete the comments in Word before sending, because a metadata cleaner cannot tell an edit you wanted to keep from one you did not.
The embedded preview image *is* removed. It is a picture of the first page stored inside the file, it survives Office's own "remove document properties" command, and it is one of the more surprising things a supposedly cleaned document can still contain.
Or turn this DOCX into something else: