Protect PDF — Add Password Security to Your Document

Set a password on your PDF file to control access. Quick, simple, and processed entirely on your own device.

🔒 Protect PDF

Add password protection to your PDF

🔒

Drop PDF to Protect

All Tools

Everything Your PDF Needs

Professional-grade tools powered entirely in your browser.

Most Popular
📦

PDF Compressor

Reduce file size up to 90% while maintaining quality

🖼️

Image to PDF

Convert JPG, PNG, WEBP images into a PDF document

🔗

Merge PDFs

Combine multiple PDFs into one single file

✂️

Split PDF

Extract pages or split PDF into multiple files

🔄

Rotate PDF

Rotate one or all pages by 90°, 180°, or 270°

📸

PDF to Images

Export each PDF page as high-quality PNG image

📋

Reorder Pages

Drag and drop to rearrange PDF pages

🔒

Protect PDF

Add password protection to your PDF

Simple Process

How It Works

01
📂

Upload

Drag & drop or click to select your file. Nothing is sent to any server.

→
02
⚙️

Configure

Choose your settings. Every tool gives you full control over the output.

→
03
⬇️

Download

Your processed file downloads instantly. Done.

Questions

Frequently Asked

Are my files safe? ▼
Yes — 100%. All processing happens locally in your browser using JavaScript. Your files are never uploaded to any server. We can't see them even if we wanted to.
Is there a file size limit? ▼
No hard limit from our side, but very large files (100MB+) may be slow depending on your device's RAM and CPU. Most PDFs work instantly.
Does it work offline? ▼
Once the page is loaded, all tools work offline since processing is done locally. You only need internet to load the page initially.
Will it add a watermark? ▼
Never. AIFreePDF adds no watermarks, no branding, no hidden metadata. What you compress is what you get.
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