Turning paper into a file feels like a clean start. The result is a PDF or image with its own properties, and the paper itself may carry marks you cannot see. This guide separates the two so you know what a tool can and cannot remove.
What a scanned file holds
- Scanner or app name in the PDF producer or creator field, and sometimes the model.
- Dates of the scan, and the computer or phone user in the author field.
- Scan settings in image tags, such as resolution and colour mode.
- Text layer from OCR: if the app added searchable text, that text is content and may include names and numbers.
- A thumbnail or preview in some formats.
Cleaning the file
Use the PDF Metadata Remover for PDFs and the Image Metadata Remover for JPEG scans. Check the result in the File Metadata Viewer. If you must keep OCR text, read it to be sure it holds nothing you wish to hide.
What about the paper itself?
Some colour laser printers print a pattern of very small dots on each page that can encode the printer’s serial number and the date and time of printing. Consumer-rights groups have documented this for years. Scanning such a page keeps the dots visible in the image. They are part of the picture, not metadata, so no metadata tool can remove them.
A safer workflow
- Scan at the lowest resolution that stays readable.
- Crop to the content and remove edge marks.
- Clean the PDF or image metadata.
- Open the result and check it as a stranger would.