BASALT · JOURNAL
How to remove image metadata from a PDF on Mac
Photographs and scans can carry EXIF metadata such as capture time, device model, GPS coordinates, and software history. When those images are placed inside a PDF, some metadata can remain even though the document looks clean.
Find the sources of metadata
Inspect embedded images, the PDF document information dictionary, XMP packets, comments, attachments, and application-specific fields. A PDF may contain both the image’s metadata and a separate author or producer field. Removing one does not guarantee that all identifying data is gone.
Flatten with a purpose
Exporting a new PDF can reduce editable layers, but flattening alone is not a complete privacy workflow. Review the visible pages, remove attachments and comments, clear document properties, and verify that hidden OCR or form values do not retain the original details.
Verify before delivery
Reopen the output in an independent viewer and inspect properties, attachments, and searchable text. If the PDF contains sensitive photographs, review the pixels for location signs, badges, screens, or handwritten notes as well as metadata.
Frequently asked questions
Does a PDF always preserve EXIF data?
No. Some exporters discard it, while others embed the original image or related metadata. Verify instead of assuming.
Is changing the PDF author field enough?
No. Image metadata, comments, attachments, OCR, and revision data can remain separately.
Should I remove all metadata?
Remove what is unnecessary, while keeping any records required for authenticity, accessibility, or compliance.
Doing it in Basalt
Basalt strips unnecessary document and embedded-file metadata locally and lets you verify the resulting PDF before it leaves your Mac. Download Basalt.
Redaction that proves itself
Basalt destroys the content you mark, then re-opens the file it wrote and proves the content is gone before it saves anything. Your documents never leave your Mac.