Password-protect a PDF without uploading it
Lock a PDF with a password and strong AES-256 encryption — entirely in your browser. The file is encrypted on your device and never sent anywhere.
Open your PDF in the Protect tool.
Set a password (and optionally restrict printing or copying).
Download the encrypted, password-protected PDF.
FAQ
How strong is the protection?
DocRazor uses AES-256 encryption — the standard for secure documents. The PDF can only be opened with the password you set.
Can you recover my password if I forget it?
No — and neither can anyone else. The encryption is applied locally and we never see your file or your password, so keep it somewhere safe.
Is my PDF uploaded to encrypt it?
No. Encryption runs entirely in your browser using WebAssembly — your document never leaves your device.
More local-first PDF tools
Part of the Secure Local Suite — sanitize text, extract mind maps, edit video and optimize PDFs, all in your browser.