Protect PDF with Password
Add a password to a PDF so it asks for it before opening. Uses strong AES-256 encryption and keeps your text and pages exactly as they are. Runs in your browser — your file and password are never uploaded.
Lock a PDF in 3 steps
Drop in the PDF or tap to choose it. It stays on your device.
Type it twice so a typo can't lock you out. Use something you'll remember.
Anyone who opens it now has to enter the password first.
When to lock a PDF
Lock Aadhaar, PAN or passport copies before you email or WhatsApp them.
Keep payslips, statements and ITR copies private.
Share scans with a college or employer without leaving them open to anyone.
Protect quotations, invoices and contracts you send to clients.
Benefits
- AES-256 encryption, the strongest PDF standard.
- Text, links and page quality stay exactly the same.
- Optional setting to stop people copying text.
- Your file and password never leave your device.
More PDF tools
Frequently asked questions
How do I put a password on a PDF?
Add the PDF, type the password twice and tap Protect PDF. Download the new file. It asks for the password every time someone opens it.
Is the password safe?
The PDF is locked with AES-256, which is the strongest encryption PDF supports. The work happens in your browser, so the password is never sent anywhere.
What if I forget the password?
It can't be recovered, by us or anyone else. Keep the original unlocked file, or note the password somewhere safe.
Does it work in every PDF reader?
Yes. Chrome, Edge, Adobe Reader and the PDF viewers on Android and iPhone all open AES-256 PDFs and ask for the password.
Can I remove the password later?
Yes. Use our PDF Password Remover with the same password to get an unlocked copy.
Is it free?
Yes, it's free with no sign-up and no watermark.
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