A Word, Excel or PowerPoint file carries who wrote it, who saved it last, how many minutes were spent on it, your company name, the template it came from, every comment, and the text somebody deleted under tracked changes but never actually removed. A PDF carries an author and the software that produced it. SCRUB takes all of that out and gives you back the same document with the visible content untouched. It runs in this tab and nothing is uploaded.
No file loaded.
The deleted text is the point. When somebody edits a contract with track changes on, the words they took out do not leave the file. They sit inside it, marked as deleted, and anyone who opens the document and switches revisions back on reads the previous number, the previous deadline, and the clause you thought had gone. SCRUB removes those blocks outright and accepts the insertions, so what you send is what the document says.
Identity comes out too. Author, last saved by, revision count, created and modified dates, last printed date, company, manager, the template path, the software version, the custom properties your firm stamps on every file, editing time, and the session identifiers that link one document to every other saved in the same sitting. Comments and the list of people who wrote them go with it.
Your content is not touched. Every visible word, number, formula and image stays exactly where it was. This is a metadata operation, not an edit. Open the clean copy before you send it, the same as you would with anything else.
Hidden worksheets are reported, not removed. A hidden sheet often holds the workings behind the numbers, and deleting one can break formulas across the workbook in ways only you can judge. SCRUB tells you it is there. Anyone who receives the file can unhide it in two clicks, so decide deliberately.
Links to outside servers are reported, not removed. A remote image in a document reports back to whoever hosts it when the file is opened, and roughly from where. They are listed rather than stripped, because removing one can leave a blank frame in the middle of your document. If you did not put it there, delete it in your editor.
A PDF keeps its pixels. SCRUB clears a PDF’s author, title, producer, dates and its XMP packet. It does not touch the page content, which means a black rectangle drawn over text in a PDF still has the text underneath it. That is a different problem and SEAL is the tool for it.
The other direction. X-RAY reads all of this out of a file somebody sent you. SCRUB takes it out of a file you are about to send. Run X-RAY on the clean copy if you want to see the result for yourself, which is a reasonable thing to want.
Nothing is uploaded. The file is unpacked, edited and repacked inside this browser tab. No copy of your document reaches a server here, and none is kept after you close the page.