Encryption with Google Apps Script

This Google Script will encrypt Gmail using the powerful and secure AES encryption. It then converts the JSON response to Base64 and sends the encrypted message via GMailApp service. See video tutorial.

The password for encryption is supplied via the input field in the form. The recipient will need this password to decrypt messages.

function encryptMail(e) {
  try {
    // get the first message from the drafts folder in Gmail
    var draft = GmailApp.search('in:drafts')[0].getMessages()[0];

    // retrieve the email body in plain text
    // ( you can also do getBody() for HTML Mail )
    var body = draft.getPlainBody();
    var to = draft.getTo();
    var subject = draft.getSubject();

    // The encrypted message is in JSON format
    var json = sjcl.encrypt(e.parameter.password, body);
    // Convert the JSON to base64 (easier to copy-paste)
    var msg = Utilities.base64Encode(Utilities.jsonStringify(json));

    // Send the encrypted message via Gmail
    GmailApp.sendEmail(to, subject, msg);
  } catch (e) {
    Logger.log(e.toString());
  }
}

Amit Agarwal is a web geek, solo entrepreneur and loves making things on the Internet. Google recently awarded him the Google Developer Expert and Google Cloud Champion title for his work on Google Workspace and Google Apps Script.

Awards & Recognition

Google Developer Expert

Google Developer Expert

Google awarded us the Developer Expert title recogizing our work in Workspace

ProductHunt Golden Kitty

ProductHunt Golden Kitty

Our Gmail tool won the Lifehack of the Year award at ProductHunt Golden Kitty Awards

Microsoft MVP Alumni

Microsoft MVP Alumni

Microsoft awarded us the Most Valuable Professional title for 5 years in a row

Google Cloud Champion

Google Cloud Champion

Google awarded us the Champion Innovator award for technical expertise

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