Add a password and strong AES-256 encryption to your PDF, so only people with the password can open it. No login, and completely private — your file never leaves your device.
or click to browse · one file at a time
No installs, no accounts. Add your file, choose a password, and download the protected PDF.
Click the box above or drag a PDF onto it.
Type the password twice so we know it's right. This is what will open the file.
Press Protect PDF and your encrypted file downloads instantly.
Add a password before emailing or sharing anything sensitive — bank statements, contracts, medical or ID documents, payslips. The recipient enters the password to open it, so a forwarded or intercepted copy stays unreadable without it.
The file is locked with AES-256, the same standard used for strong document encryption. The password can't be recovered if lost, so store it safely and share it separately from the file (for example by text or in person), never in the same email.
No. The password and encryption are applied by code running inside your own browser. Your file and your password never leave your device, which is why it's both fast and private.
The PDF is encrypted with AES-256 and given a password that's required to open it. Anyone who opens the file — in any PDF reader — will be asked for the password first.
It can't be recovered. The encryption is real, so there's no back door — not for you, and not for us. Always keep a copy of your original file and store the password somewhere safe.
Yes, in any PDF reader that lets you open the file with the password and re-save it without one. This tool only adds a password; it doesn't remove existing ones.
Not directly. Open it in a PDF reader with its current password and save an unprotected copy first, then add a new password here.
No — it's completely free with no sign-up, just like every WriteReady tool.
Any up-to-date version of Chrome, Firefox, Edge, or Safari on desktop or mobile.