Encrypt / Decrypt PDF

Protect PDF with password or remove password protection

Drag & drop a PDF file here, or click to browse

Maximum file size: 128 MB

All processing happens locally in your browser. Your files never leave your computer.

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If you need more than PDF Encrypt

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  • If you also need AI-assisted PDF editing with built-in OCR, try UPDF.

Encrypt PDFs — Free, No Upload

Lock a PDF with a password right in your browser — encrypt and decrypt PDFs locally, no upload, no sign-up.

AES-256 EncryptionOfflineNo UploadNo Sign-up

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How to Use

  1. Upload: Drop your PDF file or use the file browser
  2. Set password: Enter an open password and (optionally) owner password with permission flags
  3. Encrypt: Click Encrypt — RC4 128-bit encryption runs entirely in your browser
  4. Download: Download your password-protected PDF

Why Choose This Tool

  • 100% Local Processing: Files are processed entirely in your browser using JavaScript — never uploaded to any server.
  • No Limits: No file count or file size restrictions. Process as many files as your device can handle.
  • No Sign-up: Free forever, no account needed, no email required. Open the page and start.
  • Private by Design: Nothing is sent to any server. Close the tab and your files are gone forever.

How We Stack Up

FeatureOursSmallPDF
EncryptFree$12/mo
DecryptFree$12/mo
Local processingYesNo

Common Questions

Is my password uploaded?

No. Everything runs in your browser — the password never touches our servers.

What encryption is used?

RC4 128-bit per the PDF Reference 1.6 standard (Algorithm 2 & 3 with Revision 3 handler). It offers strong protection and is widely supported by all major PDF readers including Adobe Acrobat, Foxit, and browser-based viewers.

Are permission restrictions (block print/copy/edit) cryptographically enforced?

No. Permission restrictions are enforcement hints stored in the PDF — Adobe Acrobat Reader and Foxit Reader honor them, but built-in browser PDF viewers (Chrome, Firefox, Edge) ignore them entirely. The open password provides real cryptographic protection.

Can I decrypt a password-protected PDF?

Yes. Drop a password-protected PDF, enter its password, and the tool will produce an unencrypted version you can download.

What's the difference between open password and owner password?

Open password is required to view the document. Owner password controls permission flags (print/copy/edit restrictions) and is stored separately. Most users only need the open password.

What if I forget the password?

There is no recovery. Because nothing is uploaded, the password never leaves your device — we cannot reset it. Use a password manager.

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