We keep agonizing over what to redact in medical reports and sometimes over-redact useful context. Across the last [N=…
Open one of your PDFs in Adobe Acrobat Pro.
Best practiceMake sure you are using Adobe Acrobat Pro DC or later, as some features are not available in Standard.
Go to the 'Tools' pane and select 'Redact'.
Best practiceYou can also find 'Redact' in the right-hand pane or by searching in the Tools search bar.
Click 'Mark for Redaction' > 'Text & Images', then use your mouse to draw a redaction box over the area you want to redact.
CautionDo not apply the redaction yet; just mark the area.
Right-click the redaction mark and select 'Repeat Mark Across Pages...'.
Best practiceThis feature lets you apply the same redaction area to a range of pages within the current PDF.
In the dialog, specify the page range and click 'OK' to mark the same area on all selected pages.
Best practiceReview the marks to ensure they align correctly on each page.
To redact recurring text, click 'Find Text & Redact', enter your search term, and use 'Find Next' or 'Find All' to mark all instances.
Best practiceYou can use 'Match case' or 'Whole words only' to refine your search.
To apply these redactions across multiple PDFs, go to 'Tools' > 'Action Wizard', create a new Action, add the 'Redact' step, and configure it to use your search or redaction marks.
Best practiceYou can add multiple files to the Action and run the redaction process in batch.
Click 'Apply Redactions' to permanently remove the marked content, then save your files.
CautionRedactions are permanent and cannot be undone after saving.
For consistent redaction across multiple PDFs, carefully match the area coordinates and dimensions in each file before applying redactions.
This runs in the Acrobat app - there is no separate API for this task.
Redaction permanently removes the text or image from the PDF file. This means the hidden information is truly gone and cannot be recovered. Drawing a black box only covers the text; the text itself is still part of the document and can be copied or searched for. Always use the Redaction tool for sensitive information.
Redaction removes only the visible text and images. A PDF file can also contain hidden information like metadata, comments, or older versions of the document. Sanitize removes all this hidden data. This is important because sensitive information could still be hidden in these other parts of the file, even after you redact the visible content.
For many items like social security numbers or account numbers, you can use Acrobat's pattern-based auto-redaction. This feature can find and mark all instances of these patterns automatically. After it runs, have another person check a few random pages to make sure all sensitive data was correctly removed. This helps catch any mistakes.
Redaction Codes are labels you can add to redacted areas, like 'Privacy' or 'Confidential'. They explain why something was hidden without revealing the actual content. Using consistent codes across a team helps everyone understand the reasons for redactions. You can also edit or create your own code sets in Acrobat Pro.