Lock PDF with a password
Add a password to your PDF so only people who know it can open the file. The encryption happens in your browser.
PDF par password lagao, taaki sirf aap hi khol sako.
- 100% free
- No signup
- No watermark
- Files stay on your device
About Lock PDF
Lock PDF encrypts your document with a password you choose. Anyone who wants to open the file has to type that password first. You can pick 256-bit AES (the strongest option, for modern PDF readers) or 128-bit AES for older programs.
You can also set a separate owner password and block printing, copying text or editing. Because the encryption runs on your device, the PDF and the password are never sent to a server.
Please remember your password. If it is lost, nobody, including us, can recover the file. Keep an unlocked copy in a safe place.
How to password-protect a PDF
- Select your PDFChoose the file you want to protect.
- Set a passwordType the password twice, and choose the encryption strength and what to allow.
- Lock and downloadPress Lock PDF and save the protected file.
Why use PDFEditKaro
Real encryption
AES-256 or AES-128, applied in your browser.
Control permissions
Block printing, copying or editing if you wish.
Open anywhere
The protected PDF opens in standard readers once the password is typed.
Free and private
No signup, no watermark, and your file never leaves your device.
Frequently asked questions
Is the password really secure?
The PDF is encrypted with AES, the same standard used by Adobe Acrobat. Security still depends on choosing a long password that others cannot guess.
What if I forget the password?
It cannot be recovered. Always keep an unprotected copy of important files.
What is an owner password?
It is a second password that controls permissions such as printing and copying. People who only know the opening password cannot change those permissions.
Is my PDF or password uploaded?
No. Everything happens inside your browser.
Can I remove the password later?
Yes, with our Unlock PDF tool, if you know the password.