Email, Messaging, & Video Calls Email A Step-by-Step Guide to Deleting the Offline Gmail Cache Data Create storage space on your computer and keep emails private by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on February 27, 2020 Daniel Grill / Getty Images Email Gmail Yahoo! Mail Tweet Share Email Access Gmail when you're offline, and unsend Gmail Offline messages. When you set up Gmail to work offline, Gmail caches your data locally so that when you don't have a connection, your downloaded mail will load and provide a way to draft new messages. This is convenient if you use Gmail offline on your home computer or other trusted device. If you leave cached Gmail messages on a public computer, somebody else could potentially read your personal information. Here's how to clear your Gmail cache and get rid of these offline files, including offline messages and attachments. How to Remove Gmail Offline Cache Files To remove your offline data saved by Gmail: Open Chrome, go to the address bar, enter chrome://settings/siteData, and press Enter. To use the Chrome menu, select the three-dot icon and choose Settings. Scroll down, select Privacy and Security, then choose Clear browsing data. Check the box for Cached images and files and then click the Clear data button. In the list of site data and cookies stored in your Chrome browser, go to mail.google.com and select the trash can icon. This will delete everything coming from Gmail, including your backed up mail. To clear all site data and cookies, select Remove All. This ensures that all your offline mail is gone. It also erases site data from all sites you've visited and signs you out of sites. If you chose to remove all site data and cookies, select Clear All to remove all the Gmail Offline data and the other cookies stored in Chrome. Return to chrome://settings, and select Offline. Clear the Enable offline email check box to disable Gmail offline mode. How to Remove Data From the Gmail Offline App If you use the Gmail Offline app for Chrome, there is another way to remove your offline data. Go to the Chrome URL address bar and enter chrome://apps. Right-click or tap-and-hold the Gmail Offline option and choose Remove from Chrome. Choose Remove.