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Password-protect PDF.
Add a password so only people who know it can open your PDF.
More about sharing a protected PDF
Strong encryption depends on a strong password. Password protection does not remove metadata, attachments or visible sensitive content. Rewriting a PDF can invalidate digital signatures. Keep your original and check the downloaded copy before sharing.
Cancel or clear the tool to release the processing session. Your browser or password manager may offer its own password-saving features.