Protect PDF
Add an open password and choose whether printing and copying are allowed. Encryption happens on your device.
Processed in your browser · nothing uploaded
How it works
- 01
Choose one PDF — or several for merging.
- 02
Enter pages as ranges like 1-3, 5.
- 03
Download the new PDF. The original is untouched on your device.
About this tool
Enter a password of at least four characters and decide whether readers may print or copy text. The file is encrypted with AES-256, which every modern reader supports, and the password never leaves your browser. Keep the password somewhere safe: without it the file cannot be opened, not even by this tool.
Questions
- Do you upload my PDF?
- No. Documents are read and rewritten inside your browser with pdf-lib.
- Can I edit password-protected PDFs?
- Not yet. Encrypted files are rejected with a clear message rather than silently failing.
- Will fonts and images stay intact?
- Yes. Pages are copied as objects, not rendered, so text stays selectable and images keep their resolution.