🌍 Available worldwide — Works in any browser, any country. Your files stay private — processed 100% in your browser.

PDF-Zips

🔒 加密 PDF

为 PDF 设置密码保护 — 免费、快速、安全。

🔒

Drop PDF file(s) here

or click to browse

如何使用 加密 PDF

1

将文件拖放到上方区域，或点击选择文件。

2

点击按钮，在浏览器中即时处理您的文件。

3

处理完成后文件将自动下载，无需注册！

Performance & Details

Uses AES encryption via pdf-lib. Password is applied locally — it never touches any server. Encrypted PDFs open in any standard PDF reader (Adobe, Preview, Chrome).

All processing uses pdf-lib (open-source). Files stay in your browser — zero server uploads. Last verified: May 2026.

加密 PDF — 全美可用

加密 PDF - Los Angeles, CA加密 PDF - San Diego, CA加密 PDF - San Francisco, CA加密 PDF - Houston, TX加密 PDF - Dallas, TX加密 PDF - Austin, TX加密 PDF - New York City, NY加密 PDF - Buffalo, NY加密 PDF - Rochester, NY加密 PDF - Miami, FL加密 PDF - Orlando, FL加密 PDF - Tampa, FL加密 PDF - Chicago, IL加密 PDF - Aurora, IL加密 PDF - Naperville, IL加密 PDF - Philadelphia, PA加密 PDF - Pittsburgh, PA加密 PDF - Allentown, PA加密 PDF - Columbus, OH加密 PDF - Cleveland, OH加密 PDF - Cincinnati, OH加密 PDF - Atlanta, GA加密 PDF - Augusta, GA加密 PDF - Savannah, GA加密 PDF - Charlotte, NC加密 PDF - Raleigh, NC加密 PDF - Greensboro, NC加密 PDF - Detroit, MI加密 PDF - Grand Rapids, MI加密 PDF - Warren, MI
Browse all US locations →

加密 PDF — Available Across Europe

加密 PDF - Dublin, IE加密 PDF - Cork, IE加密 PDF - London, GB加密 PDF - Manchester, GB加密 PDF - Berlin, DE加密 PDF - Munich, DE加密 PDF - Amsterdam, NL加密 PDF - Rotterdam, NL加密 PDF - Paris, FR加密 PDF - Lyon, FR加密 PDF - Madrid, ES加密 PDF - Barcelona, ES加密 PDF - Rome, IT加密 PDF - Milan, IT加密 PDF - Zurich, CH加密 PDF - Geneva, CH
Browse all European cities →

Need More?

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加密 PDF — Frequently Asked Questions

What type of encryption is used?▼

We apply AES encryption, the industry standard used by banks and governments worldwide.

What happens if I forget the password?▼

There is no way to recover a forgotten password from an encrypted PDF. Keep your password in a safe place.

Can I set different permissions (print, copy)?▼

Currently we support open-password protection. Advanced permission controls are on our roadmap.

Will password protection slow down the PDF?▼

No — encrypted PDFs open just as fast as regular ones, just requiring a password first.

Is this tool suitable for legal or financial documents?▼

Yes — password protection adds a strong security layer for contracts, tax documents, and financial records.