Protect PDF
Lock your PDF with a password using real AES-256 encryption. Free, with no file size limits — and your document and password never leave your device.
Drop a PDF here
or click to choose — it stays on your device
1. Add your PDF
Drop a PDF or pick one from your device.
2. Set a password
Type it twice — the file is encrypted with AES-256, the strongest standard PDF encryption.
3. Download
The protected PDF is encrypted locally and downloads instantly.
Your files and passwords never leave your device — encryption happens entirely in your browser, with no uploads and no storage.