Securely Redact Text in PDFs with Apple Preview on Mac

Sometimes you want to share a PDF with someone, yet hide some of the information. For example, you may need to provide a bank statement to someone to prove you have a bank account, but not want to show the balance.

There are a number of ways you can do this, and one way that has been common for many people is using apps to pixelate the text you want to hide. But a security researcher has shown that this sort of pixelization is reversible.

Fortunately, if you use a Mac, you have access to a much more powerful redaction tool in Preview, the app you can use for viewing PDFs and images.

Read the rest of the article on The Mac Security Blog.

1 thought on “Securely Redact Text in PDFs with Apple Preview on Mac

  1. Thanks for this Kirk. I looked up your instructions again last night because I could not find the redact button anywhere. The answer is: make sure it is a PDF you are editing.
    I had taken a screen shot of a bank statement then opened it in Preview to redact the private data. But the file was a PNG so the redact button was not shown. Took me a while to realise what was the problem.

    I noticed some comments on your Mac Security Blog article also saying they could not find the redact button, so maybe they had the same problem.

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