Encrypt a PDF with a password so only people with it can open the file.
When a PDF holds something you would not want a stranger reading, a password is the simplest lock on the door. This tool encrypts a PDF so it can only be opened by someone who knows the password you set, which is exactly what you want before emailing a contract, a payslip, or anything with personal details that might get forwarded further than you intended.
You open your PDF, type the password you want to require, and the tool produces an encrypted copy for you to download. From then on, any viewer that opens the file will prompt for that password before showing a single page. The original stays as it was, and the new protected version is the one you share.
This is real encryption rather than a flimsy hide the pages trick, so the content is genuinely scrambled until the correct password is supplied. A couple of practical notes matter. Commas are stripped from the password as it is set, so avoid relying on them, and the password cannot be recovered by anyone, including you, if you forget it. Choose something you can remember or store it somewhere safe, because a lost password means a locked out file.
The obvious alternative is a paid PDF suite like Acrobat, which does the same job inside heavier software. Use this when you just need to lock one file quickly, on any device, without buying or launching a full program. If instead you want to remove a password from a file you can already open, the Unlock PDF tool is the counterpart.
It suits sending tax documents to an accountant, protecting a signed agreement before it goes over email, locking an internal report shared on a group chat, or securing scanned ID pages you have to send somewhere.
The encryption is done in your browser, so the PDF and the password never leave your device and nothing is uploaded. There is no account and no fee, and the only limit is your device's own memory when the file is very large.
There is no recovery, by design, because the file is genuinely encrypted. Keep the password somewhere safe, since a forgotten one leaves the PDF permanently locked to everyone, including you.
Commas are removed from the password when it is applied, so do not count on them being part of it. Stick to letters, numbers, and other symbols for a password you can rely on.
Yes, it applies real encryption rather than obscuring the content, so the pages cannot be read without the correct password. That is a meaningful difference from simply renaming or hiding a file.
It opens in any standard PDF viewer, which will prompt for the password before displaying the pages. The person opening it just needs a normal reader and the password you chose.
No, the pages, text, and images stay exactly the same. The only change is that a password is now required to open the file.
This tool focuses on a single password to open the file, which is what most people need. For separate permission passwords, a full desktop PDF suite offers finer control.
Polished Pixels. All tools. About. Contact. Every tool runs in your browser and your files are never uploaded.