Gmail Mark as Read

What is Gmail Mark as Read?

Most inbox cleaners either select thousands of threads at once (Gmail then hides Mark as read) or send your mail to a server. Gmail Mark as Read walks each list page and uses Gmail's own Mark as read control. Confirm first. Mark this page only, or walk every page until done. Stop anytime from the toolbar. Works on Inbox, Promotions, and search results. Runs locally on mail.google.com — no message bodies uploaded.