What it does
Files carry more than you see. A Word file remembers who wrote it, which company the copy of Word was registered to, who saved it last and how many minutes it was edited. A phone photo can hold the exact place it was taken. A PDF stores its author, the program that made it and extra XMP data.
This tool shows what it finds and then saves a clean copy. Files never leave your browser. Before you send the result on, run pre-send check for comments and tracked changes, or shrink it with file compressor.
How to use it
- Add one or more files. Each one shows a card listing what was found. Names and places are in bold.
- Press Clean and download. One file gives you that file back as
name-clean.ext. Several files give you one ZIP. - Open the clean copy to check it looks the same.
What gets removed
- Word, Excel, PowerPoint: author, last modified by, title, subject, keywords, comments field, revision count, dates, company, manager, editing time, custom properties, the preview picture and the reviewer name list.
- PDF: the information fields (title, author, creator, producer, dates) and the XMP block.
- JPG: EXIF (camera, date, GPS), XMP, IPTC and comment blocks. The picture itself is not re-compressed, so quality does not change. If the photo was turned by the camera, a tiny block that only says “turn this way” is kept so it does not appear sideways.
- PNG: text blocks, EXIF and the modified-time block.
Worked example
A photo from your phone shows GPS location 43.65330, -79.38333 and the camera model. After cleaning, adding the same file again shows no hidden details.
FAQs
Does it remove comments and tracked changes? No. Those are visible to readers and you may want them. pre-send check finds them so you can deal with them in your own editor.
Does it remove text hidden in the page itself? No. It only clears the details about the file.
Will the file still open? Yes. The text and pictures are untouched.
Is anything uploaded? No. Everything runs in your browser.
Where the numbers come from
- Office files are ZIP packages read and rewritten with fflate. PDFs use pdf-lib. JPEG and PNG are edited by dropping the metadata blocks, without re-encoding. All open source.
Standard scientific values, such as constants, atomic weights and melting points, are facts found in every textbook; we name where ours were checked. If you are an author or publisher and want a value, a credit or a table changed or removed, tell us and we will act quickly.
Last updated 2026-11-10.