Password-protect a PDF online — free
Lock your PDF with a password — the file cannot be opened without it. AES-256 encryption via pikepdf. Processed on our server; your files are never shared with third parties.
Three steps — and you're done
The entire process takes less than a minute. No software installation or registration required.
Upload your PDF
Drag the PDF or click "choose a file". Files up to 200 MB are accepted.
Enter a password
Set the password required to open the file. Use a strong password and make sure to remember it — recovery is impossible without it.
Download the protected PDF
Click "Protect PDF" — your file downloads with AES-256 encryption applied. The original is deleted from the server immediately.
Secure, fast, and free
The principles we uphold for every tool we build.
Files deleted immediately
Documents are removed from the server as soon as you download the result. We store nothing.
No third-party APIs
Processing happens on our own server — we never send your files to OpenAI, Google, or Amazon.
No registration
No account, email, or password needed. Upload your file and get the result — that's it.
Works on any device
Fully optimized for mobile and tablet — just open it in your browser.
Common questions
Answers about security, formats, and limitations.