How do I remove hidden data like comments and attachments from my PDF?

Open your PDF in Acrobat. Go to 'All tools' > 'Redact a PDF'. Select 'Sanitize document'. Click 'Remove all' to strip hidden content like comments, bookmarks, attachments, and form fields.

What is the difference between Redaction and Sanitize Document in Adobe Acrobat?

Feature What it does What it removes. Redaction Hides visible text and images permanently. Visible text, graphics, and images. Sanitize Document Removes all invisible data layers. Metadata, embedded content, scripts, comments, bookmarks, attachments, form fields, AI content.

Why is it important to sanitize a PDF document before sharing it publicly?

It is important to sanitize a PDF to prevent accidental leaks of private information. Documents often contain hidden data like author names, creation dates, or even deleted text that is still embedded. Sanitizing ensures this invisible data is removed, protecting your privacy and compliance.

If I only use the Redact tool, can my PDF still leak sensitive information?

Yes, if you only use the Redact tool, your PDF can still leak sensitive information. Redaction only handles visible text and images. It does not remove hidden layers like metadata, comments, or scripts. You must use the Sanitize Document feature in addition to redaction for full security.

What kind of invisible data does Sanitize Document remove from a PDF?

Metadata (like author and creation date) Embedded content (like hidden images or objects) Scripts and actions Comments and markups Bookmarks and attachments Form fields AI content tags

Sanitize PDFs in bulk for organizational compliance in Adobe Acrobat — How-to & AI prompts

AI prompts

3 ways to ask · copy any one

AExecute — “help me do it”Sanitize these PDF files for compliance: [list of files]...…+

Sanitize these PDF files for compliance: [list of files]. Remove any sensitive information and save clean copies.

when the reply comes backWant to set up a regular schedule for PDF sanitizing?

BImprove — “do it better”Check if my sanitized PDFs still have any hidden data or...…+

Check if my sanitized PDFs still have any hidden data or private information left. Suggest ways to improve the cleaning process.

when the reply comes backNeed tips on spotting hidden info in PDFs?

CDecide — “help me choose”Should I use Adobe Acrobat or another tool for bulk...…+

Should I use Adobe Acrobat or another tool for bulk PDF sanitization? Compare options for speed, safety, and ease of use.

when the reply comes backLooking for ways to track which files have been sanitized?

How to do it

the tool · the steps · what to avoid

1
Place all PDFs to be sanitized in a single folder on your computer.
2
Open Adobe Acrobat Pro.
3
Go to File > Action Wizard > Create New Action.
4
In the Choose Tools to Add panel, select Remove Hidden Information and click Add.
CautionEnsure you select 'Remove Hidden Information' and not 'Redact'; these are different processes.
5
Click Next to proceed to the Save & Export options.
6
Under Save, choose whether to overwrite the original files or save sanitized copies to a new folder.
Best practiceBLOGS recommend saving to a new folder to prevent accidental data loss and to allow for audit review.
7
Click Save to name and save your new action.
8
In Action Wizard, select your saved action and click Start.
9
When prompted, select the folder containing your PDFs and confirm the selection.
10
Monitor the batch process and review the summary report for any errors or files that could not be sanitized.
NoteAdobe will display a report at the end of the batch process indicating any issues encountered.

In the appWith the API

You can automate the removal of hidden data from multiple PDFs at once by creating and running a custom Action in the Action Wizard.

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

Glossary

words on this page

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.

BulkDoing something to many files at the same time.ExampleWe used the software to bulk convert hundreds of image files into PDFs simultaneously.

ComplianceFollowing the rules or laws about how something should be done.ExampleEnsuring compliance means all invoices meet the company's financial record-keeping standards.

The real tasks

the one, listed here

We occasionally leak identifiers because someone forwards an archived file without realizing embedded metadata remains.

FAQ

about this task

To sanitize many PDFs, you can use Adobe Acrobat's batch processing tools. This lets you select several files and apply the same cleaning steps to all of them, making it faster than doing each one by hand.

Sanitizing means removing any private, hidden, or sensitive information from PDFs so your organization follows privacy rules and keeps data safe.

Sanitizing protects your company by making sure no secret or personal information is accidentally shared with people who should not see it.

Some free tools can sanitize PDFs, but Adobe Acrobat is often better for large groups of files and has more reliable features for finding hidden data.

After sanitizing, open the PDFs and look for any leftover comments, metadata, or private info. You can also use Acrobat's inspection tools to double-check that nothing sensitive remains.

Sanitize PDFs in bulk for organizational compliance

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help