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Protect PDF with Password — Free, In-Browser

Free PDF password protection. AES-encrypt a PDF so only those with the password can open it. Runs in your browser — nothing uploads.

Protect PDF with a Password

AES-encrypt your PDF so only people with the password can open it.

Files never leave your browser

Drop a PDF here, or click to choose

Processed in your browser — file and password never upload

⚠ There's no recovery if you forget the password — save it somewhere safe.

About this tool

Real encryption, no upload

This tool AES-encrypts your PDF entirely in the browser. The file and the password never leave your device. Anyone who opens the protected PDF will be asked for the password first. There is no recovery if you forget it — save it somewhere safe.

How to use the Protect PDF

Takes about a minute. No signup, no download, your data stays in your browser.

  1. 1
    Open the tool. Scroll up to the Protect PDF above — it loads instantly in your browser, no install needed.
  2. 2
    Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
  3. 3
    Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.

Frequently asked questions

Common questions about the Protect PDF.

Is the Protect PDF free to use?

Yes. The Protect PDFon 7BusyBoss is completely free — no signup, no paywall, no usage cap.

Do I need to sign up to use the Protect PDF?

No. The Protect PDFworks instantly in your browser — no account needed. Signing in with Google is optional and only unlocks features like saving favorites and higher AI build limits.

Does the Protect PDF work on mobile?

Yes. Every tool on 7BusyBoss is mobile-responsive and works in any modern browser — Chrome, Safari, Firefox, Edge — on phones, tablets and desktops.

Is my data safe when I use the Protect PDF?

Yes. The Protect PDFruns entirely in your browser — your inputs never leave your device unless the tool explicitly fetches public data (e.g. currency rates). We don't store the values you type.

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