I already cleared the document properties. Is that not enough?
Usually not. That dialog edits one of the two places a PDF keeps this, and the XMP packet beside it holds the same facts as XML — your name, the software, the timestamps — where the dialog does not look. This tool removes both and then searches the finished file for the values it took out, so you can see rather than assume.
Does this change how my document looks?
No. Pages, text, images, annotations, form fields and page order are untouched. What changes is what the file says about who made it and when.
Is my file uploaded?
No. This is a static page with no endpoint to upload to: the document is read, stripped and checked in this browser tab. Open your browser's network panel while you use it, or disconnect from the internet once the page has loaded and watch it keep working.
What about the metadata inside images in the PDF?
This tool removes the document's own metadata, not camera data carried inside an image that was placed on a page. If that is what you need gone, the image tools on this site strip camera metadata when they re-encode a picture, and the redaction tool rebuilds pages as images and carries none of it across.
Can I do this to a password-protected PDF?
Not directly — an encrypted file cannot be read without its password. Remove the password with the unlock tool on this site, then strip the copy it gives you.