Want to save an email from Gmail to read offline? Every modern browser makes it easy to "print" an email in one file PDF.
How it works
Both Windows and Mac have a built-in PDF printer. Any files you send for printing to this virtual printer are converted to PDF. PDF files retain document formatting. These files are actually printed, except and if you decide to print the PDF file from a real printer later.
How to save an email as a PDF
Because almost all browsers have print support, you can use it Chrome, Edge or Firefox to print your emails in PDF. To get started, open your favorite browser and visit Gmail. Sign in to your Gmail account.
Then open the email you want to save as a PDF. In your email window, click menu with the three dots in the upper right corner and select “Print” (print).
In the "Print" window, click the drop-down menu next to "Destination" and select "Save as PDF". If necessary, give the settings you want such as layout and margins.
You will see the save dialog box. In this window, enter the name of your PDF in the "File name" field, select a folder to save your PDF and click "Save".
Your email will be saved as a PDF file in the folder you specified. Too easy. You can basically "print" as many emails as you want in the same way.