Password protect a PDF
Add a password so only people you trust can open the file.
Select PDF file
or drop them anywhere on this box
Processed privately on your device
How to password protect a PDF
- Open the PDF to protect.
- Enter a password twice and choose any restrictions.
- Select Protect PDF and download the encrypted file.
Why use PDF Karigar to password protect PDFs?
Lock sensitive PDFs with a password using strong AES-256 encryption. Optionally block printing or copying, while the text stays intact for anyone with the password.
- Private by design. Files are processed on your own device. Nothing is uploaded, stored or shared.
- Free, with no catch. No sign-up, no watermarks and no daily limits.
- Works everywhere. Runs in any modern browser on Windows, Mac, Linux, Android and iPhone.
Choosing a password that actually protects
AES-256 encryption is only as strong as the password you choose. A short or common password can be guessed by software, while a long one is effectively impossible to break.
- Use at least 12 characters. Three or four unrelated words are easy to remember and hard to guess.
- Don’t send the password in the same email as the file. Share it by phone, SMS or a different app.
- Keep the password somewhere safe. If it’s lost, nobody, including us, can open the file.
- Printing and copying restrictions are respected by most PDF readers but aren’t a security guarantee. The open password is what keeps the content private.
Typical uses: salary slips, bank statements, medical reports and ID copies sent by email.
Protect PDF: frequently asked questions
How secure is the encryption?
Files are encrypted with AES-256, the strongest standard PDF encryption.
What if I forget the password?
It can’t be recovered — not even by us, because we never see it. Keep a copy somewhere safe.
Is my password sent anywhere?
No. Encryption happens on your device; the password never leaves your browser.
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