Lock PDF
Upload a PDF, set a password, and download a locked, password-protected copy.
Drop your PDF here to lock with a password
또는 클릭하여 찾아보기 (여러 파일 허용)
How to Password Protect PDF
Secure your documents in 3 simple steps.
Upload PDF
Select the PDF file you wish to protect with a password.
Set password
Enter a strong password. This password will be required to open the file.
Download protected PDF
Download your encrypted PDF file instantly.
Why use BytCrush PDF Locker?
Protect Sensitive Data
Prevent unauthorized access to confidential contracts, financial statements, or personal records by adding strong encryption.
Secure Sharing
Safely email or share documents. Even if the file is intercepted, it cannot be viewed without the correct password.
Client-Side Encryption
For maximum security, your password and file are processed securely. We never store your password or your documents.
Important Note
Please remember your password! Because we do not store it, we cannot recover it for you if it is lost or forgotten.
Frequently Asked Questions
Common questions about this tool.
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Explore other tools to enhance your workflow.
Unlock PDF
Remove password protection from PDF files you own.
PDF 압축
조정 가능한 품질 수준으로 PDF 파일을 압축합니다. 웹 또는 인쇄용으로 최적화하세요.
Word to PDF
Convert DOC and DOCX documents to high-quality PDF.
이미지 압축
화질을 유지하면서 이미지 파일 크기를 줄입니다. JPG, PNG, WEBP 지원.
자동 압축
이미지를 특정 목표 크기(KB)로 지능적으로 압축합니다. 엄격한 제한에 완벽합니다.
PDF to Images
Convert each page of a PDF into separate images.