How can I make sure that all sensitive information, including hidden data, is removed from my PDF after redaction?

First, use the 'Redact a PDF' tool to mark and apply redactions to visible text and images. After applying redactions, run the 'Sanitize' feature in Acrobat. This removes hidden data like metadata, comments, and revision history. Finally, search for the sensitive terms in your document and try to copy-paste from the redacted areas to confirm nothing remains.

Protect Sensitive Info in Adobe Acrobat — How-to & AI prompts

AI prompts

2 ways to ask · copy any one

AExecute — “help me do it”Redact unrelated instrument serial numbers on the circuit drawing PDF so only our required…+

Redact unrelated instrument serial numbers on the circuit drawing PDF so only our required serials remain visible, add a comment explaining why redaction was done, and save the redacted file for vendor sharing.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

BImprove — “do it better”Make the redacted drawing defensible for the vendor review: remove unrelated serials, keep a…+

Make the redacted drawing defensible for the vendor review: remove unrelated serials, keep a short audit comment listing which ranges were removed and who approved the redaction, produce a redaction log page in the PDF, and note that the file is cleared for external distribution.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid

1
Open the PDF you want to redact in Adobe Acrobat Pro.
2
Go to the Tools panel and select Redact a PDF.
Best practiceIf you do not see 'Redact a PDF,' click 'View more' to expand the list of tools.
3
Use your cursor to select the text or images you want to redact.
CautionRedacted content is permanently removed after applying redactions; double-check your selections.
4
Click Apply to permanently remove the selected content.
NoteYou may be prompted to save a copy of the document after applying redactions.
5
Save the redacted PDF with a new file name.
Best practiceSaving a new copy preserves your original unredacted document.

In the appWith the API

You can preview all redaction marks before applying them to ensure nothing is missed.

This runs in the Acrobat app - there is no separate API for this task.

Glossary

words on this page

RedactionRedaction is the permanent removal of visible sensitive information from a document.ExampleThe redaction of personal names ensures privacy for all individuals mentioned in the report.

SanitizeTo remove sensitive or private information from a document before sharing it.ExampleRemember to sanitize the document by redacting personal details before sharing it publicly.

MetadataMetadata is hidden information about a file, such as who created it or when it was changed.ExampleChecking a photo's metadata reveals the camera model and the exact date it was taken.

Who does this

3 roles

ParalegalCompliance OfficerRecords Manager

FAQ

about this task

Redacting content with the 'Redact a PDF' tool permanently removes the text or image. It makes the information unrecoverable. Drawing a black box just covers the content visually; the text is still underneath and can be copied and pasted. Always use the official redaction tool for true security.

First, use the 'Redact a PDF' tool to mark and apply redactions to visible text and images.
After applying redactions, run the 'Sanitize' feature in Acrobat. This removes hidden data like metadata, comments, and revision history.
Finally, search for the sensitive terms in your document and try to copy-paste from the redacted areas to confirm nothing remains.

Redaction is a permanent action. Once you save a redacted document, you cannot undo the changes and recover the original content. Working on a copy protects your original document, allowing you to keep an unredacted version safely.

For large documents with many instances of specific patterns like SSNs or account numbers, use the pattern-based auto-redaction feature in Acrobat. This tool can find and mark all instances automatically. After auto-redaction, it is a good practice to have another person check a random sample to ensure accuracy.

No, you cannot use an API, like the Adobe PDF Services API, to automate redaction. Redaction is a feature that is only available in the desktop version of Adobe Acrobat Pro. It is not supported through any programming interface.

Protect Sensitive Info

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

Video

Other guides

When it fails