Choose a PDF or drag & drop here
Browser-based encryption · Files never leave your computer
Why Lock Your PDF Documents?
Sharing financial certificates, identity documents, bank statements, and legal agreements over email or WhatsApp can expose your private data to unauthorized access. By adding a secure password, only the person who knows the password can open and view your files.
How to Lock a PDF in 3 Easy Steps
- 01 Select or drop the PDF you wish to encrypt.
- 02 Enter and confirm your desired password.
- 03 Click "Lock & Download" to receive your password-secured file instantly.
Why use the CSC Smart Cropper PDF Lock Tool?
CSC Smart Cropper PDF Lock offers military-grade encryption directly inside your web browser. Cyber cafes, CSC centres, and students can securely encrypt files before sharing them over public messaging channels.
Popular ways to use it
- Password protect financial invoices and billing PDFs
- Secure confidential legal contracts and stamp papers
- Protect student certificates and marksheets
- Restrict unauthorized printing or modification
More free tools from CSC Smart Cropper
CSC Smart Cropper is a free online utility website for cyber cafés, CSC operators, and students. Files are never stored or uploaded.