What encryption standard does the protector use?

AES-256, the same standard used by banks and UK government agencies. Implemented via the browser's WebCrypto API — no server-side encryption involved.

What happens if I lose the password?

There's no backdoor. Lost passwords mean a permanently inaccessible PDF — store the password somewhere secure (a password manager is ideal) before sharing.

Can I set print or copy restrictions?

Yes. Use the owner password to limit printing, copying and modification independently of the user password that opens the document.

No. Encryption runs entirely in your browser. Your bundle never leaves your device — important for legal professional privilege.

Back to Tools

Bundle Password Protector

Name: Bundle Password Protector — AES-256 PDF Encryption
Author: BundleCreator

Secure your PDF bundles with password protection

Privacy-preserving: Files processed locally in your browser

Secure Encryption

Your PDF will be encrypted using AES-256. The password is never sent to any server - all encryption happens locally in your browser.

Drag & drop a PDF here

or click to select a file

PDF password protection — the standards

The encryption standards behind in-browser PDF protection.

Stat	Value	Source
Encryption standard	AES-256 (FIPS 197)	NIST FIPS 197 — Advanced Encryption Standard
Browser API used	Web Crypto API (SubtleCrypto)	MDN — Web Crypto API
Browser support	All modern browsers (Chrome, Firefox, Safari, Edge)	MDN — SubtleCrypto compatibility
UK Government data-at-rest standard	AES-256 — meets NCSC Cloud Security Principles	NCSC — Cloud Security Principles

Need secure bundle sharing?

BundleCreator includes password protection on export, plus secure sharing links with access tracking.