Password-protect a PDF
Upload the PDF, set a strong password and download the encrypted file. Without the password it can no longer be opened. Encryption uses AES-256 and happens on your device — the password is never transmitted.
Choose files
or drag and dropPDF
Your files never leave your device — everything runs locally in your browser.
How it works
- 1
Choose a PDF
The file you want to protect.
- 2
Set a password
Enter it twice; the strength meter helps you choose.
- 3
Set permissions
Optionally block printing, copying or editing.
- 4
Encrypt
Download the protected file.
When a password makes sense
Emails aren’t always encrypted in transit and can end up in the wrong inbox. For documents with health data, salaries, ID copies or customer data, a password is a simple extra barrier.
Choosing a good password
- At least 12 characters — a passphrase of several words is easy to remember and hard to guess.
- No obvious data such as birthdays or names.
- A separate password for each group of recipients.
Sharing the password safely
Never send the password in the same email as the file. Use a text message, a messenger or a phone call instead, so the document stays protected even if the email is intercepted.
Tips
- Share the password through a different channel than the file, e.g. by text message.
- A forgotten password can’t be recovered — store it safely.
- Permission restrictions without an open password offer only weak protection.