Can PDFAtlas recover my password if I forget it?

Because encryption happens 100% locally and we never store your files or passwords, lost passwords cannot be recovered.

Is my password transmitted to your servers?

Never. Passwords and file contents are computed strictly in your local device memory.

Can I restrict printing or editing?

Yes. You can configure permission restrictions along with your owner password.

100% Client-Side Privacy • Zero Server Uploads

Password Protect PDF Files Online

Lock your confidential PDF documents with military-grade AES encryption and permission restrictions without transmitting files across the internet.

Drop your PDF file here

Processed locally in your browser for 100% privacy

100% Client-Side Privacy•Free & Unlimited•Up to 100MB

About Protect PDF with PDFAtlas

Whether securing financial records, personal tax documents, or confidential business proposals, PDFAtlas allows you to encrypt your documents instantly in your browser.

Set user passwords required to open the document, configure permission locks to restrict printing or copying, and download your secured file with zero server uploads.

Zero Cloud Storage

Encryption is computed in your browser without network latency.

Standard AES Encryption

Guaranteed compatibility with all modern PDF readers.

Permission Control

Lock printing, copying, and modifications.

How to Use Protect PDF

Follow three simple steps to complete your document task without installing software or creating an account.

Select PDF File

Drop the PDF document you want to secure into the workspace.

Set Strong Password

Enter your desired open password and optional owner/permission restrictions.

Encrypt and Download

Click "Protect PDF" to apply standard AES encryption and download your protected file.

Local Browser Privacy

Files are processed directly inside your browser. No files are uploaded or stored on remote servers.

Blazing Fast Execution

Zero network upload delays. PDF operations execute instantly using high-performance WebAssembly and JavaScript engines.

Works on Any Device

Fully optimized for desktop, tablet, and mobile browsers on Windows, macOS, iOS, and Android.

Frequently Asked Questions

Clear answers to common questions about Protect PDF and PDFAtlas security.

PDFAtlas applies standard PDF AES encryption compatible with Adobe Acrobat, macOS Preview, and modern web browsers.