Protect PDF
Add a password and encrypt your PDF.
Drop your file here
or
PDF · Upload a file up to 100 MB
Your files are secure and private. Everything is processed on your device.
How it works
- Upload your PDFSelect the document to secure.
- Set a passwordChoose a strong password and permissions.
- Download the protected PDFIt cannot be opened without the password.
What this tool does
- Real PDF encryption, not a viewer-side restriction
- Separate permissions for printing and copying text
- Password never leaves your browser
- Works with any standard PDF reader
Supported formats
Maximum file size: 100 MB.
Frequently Asked Questions
The document cannot be recovered. There is no master key and no reset — store the password somewhere safe before you close the tab.
No. Encryption runs entirely in your browser, so the password and the document both stay on your device.
Any standards-compliant reader, including Adobe Acrobat, Preview, Chrome, Edge and Firefox.
Yes — use Unlock PDF with the password to produce an unprotected copy.
Privacy and security
Your file is read directly from your device and processed in your browser. It is never uploaded to a server, so there is no copy for us to keep, share or lose. Closing the tab discards everything. If you want to check this yourself: open your browser’s developer tools, switch to the Network tab, and use the tool — you will see no request carrying your file or input leave the page.
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