Free browser extension by Jason Savard that shows Gmail alerts and lets you read, archive or delete mail across several accounts without opening Gmail.
Checker Plus for Gmail is a free browser extension by developer Jason Savard that shows new Gmail messages in a popup and desktop alerts, so you can read, listen to, archive or delete them without opening Gmail. It works across several Gmail and Google Workspace accounts on Chrome, Firefox and Edge; any contribution adds extra features.
The bottom line
Free, focused Gmail notifier for people with several accounts.
7.5
Our score
7.5 / 10
Conversion Gems editorial verdict
Free; extras for any contribution
Features7/10
7 - popup reading and actions, multiple accounts, voice notifications, Do Not Disturb, side panel and AI reply suggestions.
Value9/10
9 - free to use; contributions start at a suggested $2.
Ease of use9/10
9 - install from the browser store and sign in with Google.
Ecosystem5/10
5 - Gmail and Google Workspace only, across Chrome, Firefox and Edge.
Support6/10
6 - FAQ wiki, changelog and a support forum run by the developer.
What it really is
A free Gmail notifier and quick-action popup for the browser, made by one independent developer.
Our take
If you juggle several Gmail inboxes and don't want a tab open all day, Checker Plus covers that need directly, and its store listings show regular releases. Treat the contribution as a tip that also adds extras. If you need Outlook or IMAP accounts or a standalone app, choose a full email client.
Why we rate it
Gmail notifications, popup reading and multi-account triage for free, with frequent releases.
The catch
Gmail only, a one-developer project, and the contributor feature list isn't published.
Best for
People with several Gmail accounts
Users who want voice alerts for new mail
Chrome, Firefox or Edge users
Not good for
Outlook or IMAP users
Teams that need a shared inbox
Friction report
Time to value
Install from your browser's store and sign in with Google; alerts start right away.
Scale breakpoint
Shared team inboxes and non-Gmail accounts are outside its scope.
Walled garden
None: mail stays in Gmail, and local data is removed when you uninstall.
From the store listings, checked 4 October 2026. A contribution on the developer's site adds extra features.
Frequently Asked Questions
Yes. It is free on the Chrome Web Store, Firefox Add-ons and Microsoft Edge Add-ons. Any contribution to the developer adds extra features, with suggested amounts from $2, one-time or monthly, on his contribute page (checked 4 October 2026).
The developer's privacy page says Google user data is accessed only to show it to you in the popup or notifications and is not shared with anyone else, and that only your email address is collected for paid features. Firefox lists its permissions as notifications, browser tabs and data for mail.google.com.
Yes. Checker Plus for Gmail is one: it shows new Gmail messages in a browser popup and desktop notifications and lets you act on them without opening Gmail.
Conversion Gems is a review site, not the developer. There is no separate Checker Plus account: the extension uses your Google sign-in (OAuth) for the Gmail accounts you add. Support is at https://jasonsavard.com/forum.
Yes. It is listed on Firefox Add-ons and Microsoft Edge Add-ons as well as the Chrome Web Store.
Independent developer Jason Savard, who also publishes Checker Plus for Google Calendar.
Checker Plus for Gmail alternatives
Other email tools from our reviews:
Spark Mail: Email client for desktop and mobile that handles Gmail, Outlook and IMAP accounts, with a free plan.
Shortwave: AI email client built for Gmail and Google Workspace, with desktop and mobile apps.
Mixmax: Gmail and Outlook extension for sales teams, with email tracking, sequences and scheduling.
