PDF tool

PDF Protector

Lock a PDF behind a password 🔒

Encrypt a PDF with a password using strong AES-256 encryption. Everything runs locally in your browser via WebAssembly — the file and password never leave your device. No snitching.

How to use PDF Protector

  1. Yeet your PDF here 📄✨
  2. Pick and confirm a password.
  3. Download the encrypted PDF. Locked in 🔒

What this tool does

AES-256 encryption

Uses qpdf AES-256 PDF encryption; confirm compatibility with the PDF readers your recipients use.

100% client-side

Encryption runs in your browser via WebAssembly (qpdf) — nothing gets uploaded. Locked in 🔒

Password confirmation

Type the password twice so a typo never locks YOU out. We got you fr.

Common uses

  • Require a password to open a PDF before sending it.
  • Create an AES-256 encrypted copy of a document.

Processing and privacy

Browser processing: The file and password are handled locally by a WebAssembly build of qpdf; they are not uploaded for encryption.

Limitations to know

  • A forgotten password cannot be recovered by this tool.
  • Encryption does not prevent an authorized viewer from copying information by other means.
  • Reader support and policy handling can vary across PDF applications.

Keep original files where applicable, inspect the result, and do not rely on an automated output without checking that it fits your intended use.

Practical tips

  • Store the password separately and safely. This tool has no password-recovery feature.
  • Use the Password Generator to create a strong unique password first.

Frequently asked questions

Is my password or file sent anywhere?

Never, be so fr. Encryption runs entirely in your browser using a WebAssembly build of qpdf. Nothing leaves your device. 🫡

What if I forget the password?

RizzKit cannot recover it. Keep an authorized unencrypted source copy and store the password safely.

Related tools and guidance

  • PDF Unlocker — Remove a password from a PDF you own, no cap.
  • PDF Merger — Combine multiple PDFs into one file, no crumbs.
  • PDF Compressor — Shrink PDF file size in your browser, left no crumbs.

Read practical RizzKit guides for verification steps and workflows that combine related utilities.