Lock down a PDF so only the right people can open it. Utilitly encrypts your document with AES-256 — the same standard used by banks and governments — and requires a password to open the file. Your PDF is encrypted right in your browser — it is never uploaded and stays entirely on your device.
Utilitly's Protect PDF tool adds password encryption to a PDF so it can't be opened without the password you set. The file is encrypted inside your browser by qpdf compiled to WebAssembly — it is never uploaded and never stored. The password you choose is checked in your browser as you type and is only ever used, on this device, to encrypt the file.
Your document is protected with AES-256 (Advanced Encryption Standard, 256-bit) — a widely trusted, industry-standard algorithm used to secure sensitive data across finance and government. To keep protection meaningful, the tool asks for a strong password: at least 12 characters, with upper- and lower-case letters, a number, and a special character.
This tool sets an open password: the document can't be opened at all without it, which is the strongest protection there is. If you also need to remove a password from a file you own, use the Unlock PDF tool. Because the encryption is real, there's no back door — if the password is lost, the file can't be recovered, so store it somewhere safe.
Your PDF and password never leave the tab. The encryption engine is downloaded to your browser and runs there, so there is no upload to intercept and no copy to delete. If you've searched for how to password-protect a PDF online, this does it without your file going anywhere.
AES-256 (Advanced Encryption Standard with a 256-bit key), the standard PDF password encryption used to protect sensitive data across finance and government.
This tool adds an open password, so the document can't be opened at all without it — the strongest restriction there is. It doesn't set separate print-only or copy-only permission flags.
No. Encryption runs entirely in your browser using qpdf compiled to WebAssembly. Neither your file nor your password is uploaded, and nothing is stored. You can confirm it by opening your browser's Network tab during a run, or by going offline before you press Protect.
The tool requires at least 12 characters, including an upper-case letter, a lower-case letter, a number, and a special character — enough to keep the protection meaningful. Your password is checked in the browser as you type, used there to encrypt the file, and never stored or transmitted.
There's no back door — that's the point of real encryption. If you lose the password, the document can't be opened, so store it somewhere safe.
Yes. If you know the password, you can remove it anytime with our Unlock PDF tool.
Your file never leaves your device, so there is no upload to intercept and nothing to delete afterwards. For an extra-sensitive document, protect a copy and keep the password somewhere safe.
No. Your encrypted file comes out clean, with no Utilitly branding.