Add password protection to your PDF. Restrict opening, printing, copying and editing. Your file never leaves your browser.
Drop your PDF here
or click to browse your files
PDF files only • Processed entirely in your browser
Restrictions (Optional)
Set what others can do with your PDF even after opening it.
Drop your PDF or click to browse. Everything stays in your browser — nothing is uploaded to any server.
Enter your password and choose what others can do — printing, copying or editing.
Click Protect & Download. Your password-protected PDF is ready instantly — no watermark, no account needed.
🔒 This tool processes files entirely in your browser. We do not upload, store, or share your documents.
Whether you're sharing a confidential business report, a personal document, or an important certificate, adding a password to your PDF ensures that only the right people can open it. QuickPDFonline's Protect PDF tool lets you add 256-bit AES encryption directly in your browser — no software required.
You can set an open password so the file can't be opened without it, and also control permissions like printing, copying text, and editing. All processing happens entirely in your browser. Your files are never uploaded to any server — your documents stay completely private on your device.
Perfect for students protecting their assignments, professionals securing confidential reports, or anyone who needs to share a PDF safely. No registration, no watermark, and no file size limit on a free trial — just fast, reliable password protection every time.
अगर आप अपना PDF किसी को share कर रहे हैं और चाहते हैं कि वो बिना password के open न हो — तो बस यहाँ PDF upload करें, एक strong password set करें और Download करें। आपकी file पूरी तरह safe रहती है — कोई server पर upload नहीं होता। Password याद रखें — अगर भूल गए तो file open नहीं होगी।
No. All processing happens entirely inside your browser using JavaScript. Your file never leaves your device — not even a single byte is sent to any server. This means your confidential documents stay completely private throughout the process.
This tool uses 256-bit AES encryption — the same standard used by banks and government institutions. It is currently the strongest encryption available for PDF files and is supported by all major PDF viewers including Adobe Acrobat, Chrome, and mobile apps.
If you forget the password, there is no way to recover it — this is by design to ensure security. Always save your password in a safe place before distributing the protected PDF. We do not store your password anywhere, so we cannot help recover it.
Yes. You can set permission restrictions (disable printing, copying, or editing) independently of the open password. This lets you share a PDF that anyone can open, but prevents them from modifying or copying the content — useful for sharing read-only documents.
Yes. The output is a standard password-protected PDF file that works on any device — Android, iPhone, Windows, or Mac. Any PDF viewer that supports encryption (Adobe Acrobat, WPS, Google Drive, Apple Books, etc.) will prompt for the password before opening.