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Protect PDF (Add Password)
Lock a PDF with a password so only you can open it
Free
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About this tool
Add a password to a PDF so it requires that password to open — useful for sharing sensitive documents securely.
Frequently asked questions
What happens if I forget the password?
The PDF becomes unopenable — we don't store the password anywhere, so there's no way to recover it. Keep it somewhere safe.
Is my file or password stored anywhere?
No — the file is processed and returned to you; nothing is kept afterward.
Can I remove a password later?
Yes — use our Unlock PDF tool with the correct password to remove the protection.