How to encrypt a PDF file for email and send it secured

Matthew Adams
by Matthew Adams
Windows & Software Expert
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  • Some users might wonder how to encrypt PDF files for emails so they can send secure PDF attachments.
  • You can encrypt a PDF file for email Outlook, and other messaging software, with some PDF document software.
  • Users who wonder how to encrypt PDF files for Gmail can secure messages with some Google Chrome extensions.
  • Some web apps are worth noting if you're wondering how to encrypt a PDF file for email for free.
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Portable Document Format is among the most universal file formats, along with the ones from Microsoft Office.

Millions of users save their documents as PDF documents so they can easily share and exchange them with colleagues irrespective of hardware and operating systems.

Some users might need to secure PDF files with password encryption before sharing them via emails.

Various PDF software packages enable users to apply password encryption to PDF files. There are also a few ways you can encrypt PDF documents without PDF software.

How can I encrypt PDF documents for emails?

1. Encrypt the PDF with using Adobe software

Acrobat created the original PDF software for the Portable Document Format.

That is why their solution has remained the world’s foremost PDF software ever since the early 1990s thanks to its comprehensive options and tools for converting, editing, signing, and sharing PDF files.

This tool is one of the best software to secure PDF files with. You can click File and choose Protect Using Password to set up a standard password.

However, you can also select alternative advanced encryption and compatibility settings for the PDF files.

Other useful features of this software:

  • It enables users to compress PDF files
  • Users can split PDF files with Acrobat’s Split tool
  • Acrobat’s Prepare Form utility enables users to set up fillable forms
  • Includes a Compare Tool with which users can compare PDF document text
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2. Archive the PDF document with a great compression tool

Alternatively, you can secure a PDF file by archiving it within an encrypted ZIP file for email. To set up encrypted ZIP archives, check out the dedicated solution recommended below.

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This tool is among the foremost file compression utilities for Windows 10, 8, and 7 with which you can compress, convert, and back up files.

You can encrypt archives by turning its Encrypt option on. Then you’ll need to drag a PDF for the archive into the dedicated pane.

An Encrypt window will open for establishing passwords. You can select an AES 256-encryption option for the archive by clicking Options on the software’s Actions pane.

Other useful features of this tool:

  • It includes a Word to PDF document converter
  • Users can save, move, and copy files using the file management mode
  • You can use it to convert files to the PDF format
  • This archive utility incorporates a Combine PDF files option for combining PDF documents

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3. Encrypt PDFs using an online tool

  1. First, open the Password Protect PDF dedicated webpage to use the app.
    The Password Protect PDF app How to encrypt a pdf file for email
  2. Click the Choose File button to select a PDF to encrypt.
  3. Then enter a password for the PDF document.
  4. Press the Encrypt PDF button.
  5. Press the Download button to save the encrypted document to your PC.

You can use this online tool to password protect a PDF with an extremely simple and quick procedure described in the steps above.


4. Send secure emails by using browser extensions

  1. To send secure emails for PDF attachments with Gmail, click the Add to Chrome button on the SendSafely extension page.
  2. Next, click the extension button on Chrome’s toolbar.
  3. Click the Register Now for Free button to establish an account.
  4. With an account established, input your access credentials, and click the Go button.
  5. Click the Google Mail Integration button to enable Gmail integration.
    The SendSafely settings How to encrypt a pdf file for email
  6. Open Gmail within a browser.
  7. Click the Compose button in Gmail.
  8. Then toggle the Message Encryption option on.
  9. Alternatively, you can click the Upload button within Gmail’s message editor to encrypt PDF file attachments only.

Yes, you can also use a simple browser extension to send encrypted mail messages. At least the extension recommended above does this job perfectly so try it.


5. Send the attachment’s message with an encrypted email service

Tutanota website How to encrypt a pdf file for email

There are also numerous encrypted webmail services with which users can send PDF attachment emails more securely without needing additional extensions.

You don’t have to look any further because we have an excellent list with the best encrypted webmails to use right now.


If you also need PDF attachment messages encrypted, you can also register with an encrypted webmail service.

That’s how you can encrypt PDF files for emails and send them more securely. If you happen to know any other solutions we didn’t cover or you’ve tested some of these solutions, leave us a comment below.

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