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Redact a PDF for FOIA Requests

Responding to a FOIA or public records request means releasing a document while withholding the parts an exemption covers: personal identifiers, deliberative material, law enforcement detail, third party information. The release itself is the point, so the redaction has to be right the first time.

The recurring failure in published disclosures is not a legal misjudgement about what to withhold. It is technical. Someone draws a black rectangle in a PDF editor, which places a graphic on top of the page while leaving the text underneath perfectly intact. Anyone who selects the area, copies it, or runs text extraction gets the withheld material back. This has happened to courts, government departments and law firms, and it is usually discovered by a journalist rather than by the releasing body.

Redaction here removes the content. Marked regions are flattened so the underlying text and image data are no longer present in the output file, which is why selecting a redacted area afterwards returns nothing at all.

There is also a workflow problem worth naming. Uploading an unredacted response to an online tool in order to redact it means transmitting the exempt material, in full, to a third party, before any of it has been removed. For material that is exempt precisely because it should not be disclosed, that is an odd first step. Processing on your own machine removes it.

One thing redaction does not touch is everything stored around the page. Author names, revision timestamps, the producing software and the original filename all sit in the document metadata and survive redaction untouched. Run Scrub Metadata before the file goes out.

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Frequently asked questions

Is the redacted text actually removed?

Yes. The marked regions are flattened so the original text and image data are not present in the released file. Verify it yourself by opening the download and attempting to select or search for the withheld text.

Why is drawing a black box in a PDF editor not enough?

Because a drawn rectangle is a graphic layered over the page. The text beneath it is unchanged and remains selectable, copyable and extractable by any script. This is the specific mistake behind most published redaction failures.

Does this handle metadata as well?

No, and it is the second most common oversight. Author, timestamps and producing software live outside the page content and survive redaction. Run Scrub Metadata on the file before release.

Is it appropriate for an official disclosure?

The removal is genuine, which is the technical requirement. Follow your own verification procedure as well, since responsibility for what is released rests with the releasing body rather than with any tool.

Does the document leave my machine?

No. It is processed in your browser, which matters here more than on most tools, because the document you are working with is by definition one containing material that must not be disclosed.