What it does
ActuallyFreeTools password-protects PDFs for free with AES-256 encryption, the same standard Acrobat uses. The file cannot be opened without your password, and you can also block printing, copying text or editing. Encryption runs entirely in your browser, so neither the document nor the password is ever sent anywhere.
How to use it
- Drop the PDF.
- Type the password twice and choose what to allow.
- Protect and download the encrypted PDF.
Questions people ask
How secure is it?
AES-256 is the strongest encryption the PDF format offers. Security then depends on the password — use a long, unique one.
What if I forget the password?
It cannot be recovered by anyone, including us. Keep a copy of the original or note the password safely.
Do restrictions like “no printing” always work?
Reputable viewers respect them, but restrictions are weaker than the open password. Rely on the open password for real secrecy.
Is Protect PDF on ActuallyFreeTools really free?
Yes. There is no sign-up, no daily limit, no watermark and no paid tier. Nothing is held back for paying users.
Are my files uploaded anywhere?
No. Protect PDF runs inside your browser, so your files are processed on your own device and never sent to a server. That is also why there is nothing to meter or charge for.
Related tools
Last updated 30 October 2026. ActuallyFreeTools tools run entirely in your browser.