Open a PDF's "Properties" or "Document Info" panel and you'll usually find an author, a creation date, and the software used — collectively called metadata, a layer of information embedded inside the file that doesn't normally show up on the page itself.
What PDF metadata typically includes
- Title, author: either filled in manually by whoever created it, or auto-populated from a software account name.
- Creation date / modification date: timestamps for when the file was first generated and last edited and saved.
- The software used to create/edit it: something like "Microsoft Word," "Adobe Acrobat," or the name of an online tool.
- Keywords, subject: sometimes filled in to make archival search easier.
How to check it
Most built-in PDF readers show this: on macOS, open with Preview and press Cmd+I for Get Info; on Windows, right-click the file, choose Properties, then the Details tab; in Adobe Acrobat it's File → Document Properties.
Where metadata actually gets used
- Legal evidence: in contract disputes, creation and modification timestamps are sometimes cited to help establish when a document was really generated.
- Enterprise archiving: many document management systems rely on title and keyword fields for bulk search and categorization.
- Privacy: if you export an internal draft and send it to an outside client, the metadata might still carry an internal author's name or computer username — checking metadata before sending something important is an easy habit to skip, and worth doing anyway.
What happens to metadata when you edit a PDF
Most PDF editors, LocalPDF included, generate a fresh file when you make changes and export — metadata fields like creation time and software name usually update to reflect the latest edit. That's normal behavior, not a sign anything's wrong with the original file.
Next time you open a PDF, take a second to check what its metadata says.
Open LocalPDF →