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url: "https://imagifyconvert.com/tools/encrypt-pdf"
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# Encrypt PDF

Protect a PDF with an AES-256 opening password. Your files stay on your device.

### Encrypt PDF

Protect a PDF with an AES-256 opening password.

Your documents are processed on this device. Files are not uploaded. Maximum 100 MB per file.

Drop files or a folder here

Choose a PDF document.

New opening password

Source PDF password (if needed)

- Keep the password securely. Password loss cannot be recovered by this tool.

## How to use Encrypt PDF

- Choose your files or drop them into the upload area.

- Adjust the settings and review the processing notes.

- Run the tool and check the downloaded result before sharing.

Files are processed in your browser. Engines, fonts and OCR or speech models may need to download first. Processing speed and file limits depend on your device.

## Related tools

[All PDF Tools Browse the complete private document workspace.](https://imagifyconvert.com/tools/pdf) [Merge PDF Render and combine multiple PDFs into one image-based document.](https://imagifyconvert.com/tools/merge-pdf) [PDF to Image Convert PDF pages to PNG or JPG locally in your browser.](https://imagifyconvert.com/tools/pdf-to-image)

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[Interactive page](https://imagifyconvert.com/tools/encrypt-pdf) · [Site guide](https://imagifyconvert.com/llms.txt)

JavaScript is required to operate the tools. File processing runs in your browser; this Markdown page describes the interface and guidance.