Can I protect a PDF for free?
Yes. Protect PDF is free to use directly in your browser.
Free online PDF tool
Protect PDF
Add a real password to a PDF with local browser encryption and no file upload.
FreeSecureWorks in your browser
Drop your PDF file here
Drop files here or choose files. Upload one unlocked PDF file and add a password locally in your browser.
FreeSecureWorks in your browser
Password protection
Your PDF is encrypted locally in your browser. Your password and file are never uploaded.
Private by DesignPassword strengthWeak
Use at least 6 characters. A stronger password mixes uppercase, lowercase, numbers and symbols.
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Protect a PDF with a password online
LiftPDF uses QPDF compiled to WebAssembly to apply real PDF password encryption locally in your browser. Your file and password are never uploaded to a server.
FAQ
Are my PDFs uploaded?
No. Your PDF stays on your device and is encrypted locally in the browser.
Is the password added locally?
Yes. LiftPDF runs the encryption engine in your browser and does not send your password to a backend.
Can I remove the password later?
You can remove a PDF password later with an unlock tool if you know the correct password.
Does this encrypt the PDF?
Yes. The exported file uses real PDF password encryption and requires the password when opened in PDF viewers.