Back
PDF解锁

上传加密的PDF文件

将PDF文件拖到此处，或 点击上传
最大文件大小：100MB

    上传加密的PDF文件

    Free PDF Unlock Tool - Remove PDF Password Protection

    Instantly Remove Password Protection from PDF Files

    Our PDF unlock tool is a powerful, free online solution that removes password protection from PDF files instantly. Whether you need to unlock encrypted documents for editing, printing, or sharing, our tool provides a secure, browser-based solution with complete privacy protection.

    Why Choose Our PDF Password Remover?

    🔒 100% Privacy Protection

    All processing happens locally in your browser using WebAssembly technology. Your files never leave your device, ensuring complete privacy and security for sensitive documents.

    ⚡ Lightning-Fast Processing

    Remove PDF passwords in seconds with our optimized encryption handling. Supports all PDF versions and encryption types from 40-bit RC4 to 256-bit AES.

    📄 Preserve Document Quality

    Unlocking preserves all content, formatting, bookmarks, and metadata. Only the password protection is removed - everything else stays intact.

    💰 Completely Free

    No hidden costs, no premium versions, no usage limits. Unlock unlimited PDF files without registration or subscription.

    How to Use the PDF Unlock Tool

    Step 1: Upload Your Protected PDF

    Click the upload area or drag your password-protected PDF file into the browser. The file loads locally - nothing is sent to our servers.

    Step 2: Enter the PDF Password

    Input the password used to open the PDF file. This must be the correct "user password" or "open password".

    Step 3: Unlock and Download

    Click "Unlock PDF" to start processing. Once unlocked, download your file immediately. The new PDF opens without password restrictions.

    Technical Features

    Encryption Support

    • 40-bit RC4: Legacy PDF encryption
    • 128-bit RC4/AES: Standard encryption
    • 256-bit AES: Maximum security encryption
    • All PDF versions: 1.0 to 2.0 compatibility

    Browser Compatibility

    • Chrome/Edge 88+, Firefox 85+, Safari 14+
    • Mobile browsers (iOS/Android)
    • No installation required

    Common Use Cases

    Business & Legal: Unlock contracts, reports, and confidential documents for easier management and sharing.
    Academic & Research: Remove passwords from research papers, thesis documents, and educational materials.
    Personal Use: Unlock tax documents, medical records, insurance papers, and personal archives.

    Frequently Asked Questions

    Q: Is this PDF unlock tool really free? A: Yes, completely free with no hidden costs or usage limits.
    Q: Is it safe to use? A: Absolutely. All processing is done locally in your browser - we never see your files or passwords.
    Q: Can this crack unknown passwords? A: No, this is not a password cracker. You must know the correct password to unlock the PDF.
    Q: What happens to unlocked files? A: Unlocked files have password protection removed but maintain all original content and quality.
    Start unlocking your PDF files now - no downloads, no uploads, complete privacy protection!