March 23, 20263 min read

Redact PDF — Permanently Remove Sensitive Information

Permanently black out and remove sensitive text, images, and data from PDFs. Free online PDF redaction tool for privacy and compliance.

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Permanently Remove Sensitive Information from PDFs

Need to share a document but hide confidential details? MyPDF's Redact tool permanently removes selected text, images, and data from your PDF — the redacted content is completely destroyed, not just covered up.

How Redaction Works

Step 1: Upload Your PDF

Open the Redact PDF tool and upload the document containing sensitive information.

Step 2: Select Areas to Redact

Click or drag to mark the areas you want to permanently remove:


  • Text selection — Highlight specific words, sentences, or paragraphs

  • Area selection — Draw rectangles over images, signatures, or mixed content

  • Search and redact — Find all occurrences of a word (e.g., "SSN", a name, an email) and redact them all at once


Step 3: Apply and Download

Click "Apply Redaction" and download the sanitized PDF. The underlying data is permanently removed — not just hidden behind black boxes.

Redaction vs. Covering Up — The Critical Difference

MethodData Removed?Can Be Recovered?
Proper redaction (MyPDF)Yes — bytes deletedNo — permanently gone
Drawing black boxesNo — just overlaidYes — copy/paste reveals text
Highlighting in blackNo — just coloredYes — select and copy
Using white rectanglesNo — just coveredYes — change background color
Never use black boxes or highlights for redaction. The text underneath remains in the PDF and can be extracted.

What to Redact

  • Personal data — Names, addresses, phone numbers, SSNs, dates of birth
  • Financial information — Account numbers, credit card numbers, salary figures
  • Medical records — Patient data, diagnoses, treatment details (HIPAA)
  • Legal documents — Case numbers, witness information, privileged content
  • Business data — Trade secrets, proprietary information, internal pricing
  • Government documents — Classified information, FOIA responses

Tips

  1. Search and redact — Use the search function to find ALL instances of a name or number, don't rely on visual scanning
  2. Check metadata too — PDF metadata (author, creation date, comments) may also contain sensitive info
  3. Verify after redaction — Try selecting text around redacted areas to confirm the data is truly gone
  4. Flatten after redacting — Use Flatten PDF to merge all layers after redaction
  5. Protect after redacting — Use Protect PDF to add password protection

Frequently Asked Questions

Is the redacted data truly gone?

Yes. MyPDF removes the underlying data bytes, not just the visual representation. The original content cannot be recovered from the redacted PDF.

Can I redact multiple pages?

Yes. Mark redactions across any number of pages before applying them all at once.

Does it work on scanned PDFs?

For scanned PDFs (images), redaction covers the area with a black box. Since the text isn't selectable in scanned PDFs, this is effectively permanent.

Is it free?

100% free — no sign-up, no watermarks.
  • Protect PDF — Add password protection after redacting
  • Flatten PDF — Merge all layers permanently
  • OCR PDF — Make scanned PDFs searchable before redacting
  • Compress PDF — Reduce file size after redaction
  • Sign PDF — Sign the redacted document
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