100% Private
All processing happens in your browser. Your files are never uploaded to any server — they never leave your device.
Protect PDF
Add password protection to your PDF
Legacy encryption notice
This tool uses legacy RC4-128 PDF encryption, which is weaker than modern AES encryption. Use an AES-capable tool for highly sensitive documents.
Protect PDF
Protect your PDF with a password. Secure your documents. Free and private.
-
Upload files
Drag and drop files here Files stay on your device — no upload, no server
-
Apply
Add password protection to your PDF
-
Download
Done — your file is ready
File size
- File is too large. Maximum size is 100 MB.
- The selected files are too large. Total size must not exceed 200 MB.
- This PDF has too many pages. The maximum is 200 pages.