Tools

Edit PDF metadata

The properties a reader shows and a search engine indexes: title, author, subject, keywords, the creating application and the creation date. Edit them, copy the shared ones to a whole batch, or clear every field before a document leaves the house. Written to the Info dictionary and to the XMP packet alike, so every viewer shows the same thing.

Step-by-step guide with screenshots

Drop PDF files here

Drag them straight from your desktop

or
  • PDF files only
  • Up to 15 MB each
  • 2 files a run - unlimited with Pro

Frequently asked questions

Why do some viewers still show the old title after other tools change it?

A PDF states its properties twice: in the Info dictionary and, when the producing application wrote one, in an XMP packet - and some viewers trust the XMP when both exist. This tool writes every field to both and removes an emptied field from both, so the viewers agree.

Can I strip all metadata before sharing a document?

Yes: Clear all empties every field - title, author, subject, keywords, application and creation date - and the file is saved without them. The producer reads MammothPDF and the modification date is the time of saving; nothing else about you is written.

Does it change the pages?

No. Only the document's properties are written; the pages, bookmarks, links and forms are untouched.

Is the PDF uploaded?

Nothing is uploaded: the file is opened and processed inside your browser and never leaves your device. Close the tab and it is gone.

Can I set the same author and keywords on a batch?

Yes - fill them in on one file and use "apply to every file": author, subject, keywords and the creating application are copied to the others. The title and the creation date stay each file's own, since those belong to the individual document.

Why does the producer say MammothPDF?

Because we are the program that wrote the saved file - that is what the producer field is for, and the modification date is the moment you saved. The creator, the application you name as having made the document, is yours to set and we leave it alone.

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