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Password Protect a PDF (AES-256 Encryption)

Encrypt a PDF with a password (AES-256) so only authorized people can open it. You can also block printing and text copying. Ideal for sending sensitive documents.

🔗 Direct link sahlify.uk/en/protect-pdf/

How does it work?

Type or paste your data.
The result appears instantly.
Copy or download the result.

Why use Protect PDF?

✓ 100% free, no limits, no watermark
✓ No sign-up, no install
🔒 Files processed locally: full privacy
📱 Works on desktop, tablet and mobile

Frequently asked questions

Is my password sent anywhere?

No, encryption happens in your browser.

What if I forget the password?

It cannot be recovered: keep an unprotected copy somewhere safe.

Which encryption is used?

The PDF is encrypted with the standard PDF method recognised by all readers (Adobe, browsers, Preview).

Can I prevent printing?

Yes, tick the printing and copying restrictions.

Is this tool really free?

Yes, 100% free, with no sign-up, no watermark and no usage limit.

Are my files safe?

Yes. Processing happens directly in your browser: your files are never uploaded to a server or stored.

When to use it

Password-protecting a PDF secures payslips, bank statements, medical files, contracts or ID documents sent by email. Only a recipient who knows the password can open it.

Our tips

💡 Send the password through a different channel (SMS, call) from the file.
💡 Use at least 10 characters mixing letters and numbers.
💡 Keep an unprotected copy safe: a lost password cannot be recovered.