How to Redact a PDF — Hide Sensitive Information for Good

You're sharing a contract or a financial report and you need to hide a few names, account numbers or addresses. Slap a black box over the text and call it done? Don't. The text is still there underneath.

Cover vs redact: the critical difference

A drawn black box is a visual layer. The original text remains in the PDF and can be selected, copied or extracted with any text-extraction tool. Real redaction removes the underlying content from the file.

How to redact properly

1. Open Redact PDF.
2. Upload your file.
3. Draw black-out boxes over the sensitive content.
4. Apply redactions — this is the step that removes the content.
5. Download the redacted PDF.

What to redact

• Personal data (names, addresses, phone numbers).
• Financial details (account numbers, salaries).
• Identification numbers (SSN, passport, driver's licence).
• Trade secrets and confidential business terms.

Don't forget metadata

PDFs carry hidden metadata: author name, original filename, comments, revision history. Strip it as part of your redaction workflow — most editors have a "remove hidden information" option.

Verify before sending

After redacting, open the file fresh and try to select the redacted text. Nothing should highlight. Do this every time.