Protect PDF — Add Password Protection Instantly

Add password protection to PDF files. Fast, free, and private.

100% processed in your browser

How It Works

1

Upload Your File

Drag and drop or click to select your file.

2

Panda Processes It

Everything happens instantly in your browser — no uploads.

3

Download Your File

Your processed file is ready. Click download and you're done.

Frequently Asked Questions

How do I password-protect a PDF for free?

Drop your PDF into the tool above, enter a password, and click Protect. The encrypted file downloads instantly — no signup, no upload.

What encryption standard does this tool use?

PandaToolz uses AES-256 encryption, the same standard used by governments, banks, and security professionals worldwide.

Is it safe to encrypt PDFs online?

Yes — your file never leaves your browser. Encryption happens entirely on your device using WebAssembly technology. No data is sent to any server.

Can I restrict printing and editing?

Yes — you can set granular permissions to control whether recipients can print, copy text, or edit the protected PDF.

About Protect PDF

PandaToolz Protect PDF is a free online tool that adds password protection to your PDF files using AES-256 encryption — the same standard used by governments and banks. Everything happens in your browser; your file is never uploaded to any server. Upload your PDF, set a password, and optionally restrict printing, copying, or editing. The tool uses QPDF, a battle-tested open-source PDF engine compiled to WebAssembly, so encryption is fast and reliable. Whether you need to protect contracts, financial documents, medical records, or personal files, this tool keeps them secure. There is no signup, no watermark, and no file limit.

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