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Rotina Diária

Protect PDF with a password

Encrypt your PDF with an opening password (AES-256) and restrict copying and printing.

or drag and drop here · Ctrl+V to paste

Keep it safe: you won’t be able to open the PDF without it.

Processed on your device. Your files aren't uploaded to any server.

How to use: Protect PDF with a password

  1. Select one or more PDFs.
  2. Set a password and permissions.
  3. Click Protect PDF and download your encrypted file.

Frequently asked questions

What encryption is used?

256-bit AES, the strongest standard supported by the PDF format, powered by QPDF—the same engine used by professional tools.

I forgot the password. Can you recover it?

No. Your password never leaves your browser, and we don’t store anything. Be sure to write it down before you upload the PDF.

Is my password sent to the server?

No. Encryption happens on your device. Neither the file nor the password is transmitted.

Are my files uploaded to a server?

No. This tool runs entirely in your browser: your file is read and processed on your device, and not a single byte is sent over the internet. You can even disconnect from the internet after the page loads.

Is it really free? Is there a daily limit?

It's free with no daily limits. Processing happens on your device, so there's no per-use cost and no need to limit you.

Does it work on phones?

Yes. The site works in any modern browser on Android, iPhone, Windows, Mac, and Linux—no installation needed.

Related tools

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Unlock PDF Remove the password and restrictions from a PDF you’re authorized to open. Sign PDF Draw, type, or upload your signature, then place it on the document. Merge PDF Combine multiple PDF files into one, in any order you choose. Split PDF Split a PDF into multiple files by page range or one page at a time. Organize PDF Reorder, rotate, and delete pages by dragging thumbnails. Compress PDF Reduce your PDF file size while keeping it easy to read. Edit PDF Edit existing text in your PDF by clicking it. Add or delete text, highlight, draw, insert shapes, images, signatures, links, and fields—or rotate, delete, and rearrange pages. Document Scanner Turn document photos into scanned PDFs. Crop the corners, correct the perspective, and convert them to black and white.