Gmail offline lets you read, write, search and archive mail in Chrome with no internet connection. Google’s stated requirements are a Chrome window that isn’t in Incognito mode, and for work accounts, an admin who has switched the feature on.

One thing to clear up before the setup steps, because it sends a lot of people to the wrong instructions.

Why Does Gmail Say You’re Offline? Two Different Problems

“Offline” means two unrelated things in Gmail, and Google’s documentation never distinguishes them.

• The feature. Gmail offline is a setting you switch on so mail keeps working without a connection. That is what this page sets up.
• The error. A banner saying you’re offline means Gmail can’t reach Google’s servers right now. No setting fixes that one.

Google publishes no page explaining the second meaning under the word offline. Its closest article is headed “No connection,” and the phrase Gmail shows people appears nowhere on it.

We checked seven Google help pages for this. The word offline appears only in the feature sense, and never in the connectivity sense.

So if Gmail says you’re offline and you never switched the feature on, use Google’s connection checks. Test your internet, restart the device, toggle Wi-Fi off and back on, then try another network.

What Is Gmail Offline and Why Would You Use It?

Quick Answer: Gmail Offline syncs your recent emails to your computer so you can read, draft, and organize messages without an internet connection. It is built directly into Gmail, no Chrome extension required. Actions taken offline sync automatically when you reconnect.

Wi-Fi is widely available, but not universally reliable. Gmail Offline exists for the moments when your connection drops unexpectedly, when you are in a location with no available internet, or when you are traveling and need to manage email during a flight or a drive. With Gmail Offline enabled, you can continue reading emails, drafting responses, and organizing your inbox while you wait for connectivity to return.

An earlier version of Gmail Offline existed as a separate Chrome extension that was difficult to install, slow to load, and had limited options. The current version is a native Gmail feature built directly into Gmail Settings. Google has streamlined the setup process and resolved the reliability issues that plagued the earlier extension.

What Gmail Offline Requires, and Why Two Google Pages Disagree

Google publishes two different requirement lists for one feature, and the shorter list sits on the page most people find.

Google’s consumer page states its requirement in full:

You can only use Gmail offline in a Chrome browser window that isn’t in Incognito mode.

Google’s admin page adds three requirements the consumer page never mentions.

• Chrome 61 or later. Google says you need “the latest version of the Chrome browser, version 61 or later.”
• A single tab. Google says “Gmail must be open in a single tab in your browser.”
• Admin approval. Google says “an admin must enable offline Gmail in your Admin console” for Workspace accounts.

The single-tab rule is the one that bites. Somebody following the consumer page with Gmail open in three tabs never learns why syncing stalls.

Work accounts have a second trap. Google says that if an admin disables Gmail offline for a domain, it stops working even for users who enabled it themselves.

You Don’t Have to Bookmark Gmail to Use It Offline

Bookmarking mail.google.com is optional. Google labels it a “Tip” on the consumer page, and its admin page offers typing mail.google.com into Chrome as an equal alternative.

Guides that present the bookmark as a required setup step are adding a rule Google never wrote. If Gmail is online but crawling, that’s a separate problem, and we cover why Gmail is slow and the fixes Google documents.

Gmail Offline Sync Settings: The Exact Numbers Google Publishes

Every figure below comes from Google’s admin documentation. Google’s consumer page publishes none of them, which is why they are hard to find.

Setting	What Google publishes
Sync period options	Google says the values are 7, 30 and 90 days.
Default period	Google says Gmail stores the latest 30 days of email and attachments by default.
Attachments	Google says attachments download by default, and you can uncheck the Download attachments box.
Disk space	Google says Chrome allows Gmail up to 60% of your available hard drive space.
What is excluded	Google says spam and trash are not stored offline.

How Do You Enable Gmail Offline?

Quick Answer: Go to Gmail Settings > Offline tab > check “Enable offline mail.” Choose sync duration (7, 30, or 90 days), storage preference (keep or remove data on logout), and whether to download attachments. Click Save Changes. You must be online when you first enable it.

To enable Gmail Offline, go to Gmail Settings > Offline tab and check “Enable offline mail.” You can also access this by opening Gmail Settings and clicking the Offline tab directly.

You will see several options to configure: how many days of messages to sync (7, 30, or 90 days), whether to keep offline data on your computer or remove it when you log out, and whether to download attachments for offline access. Customize these settings based on your needs, then click Save Changes.

Important: Gmail Offline requires an internet connection for initial setup, since it needs to sync your emails to local storage. If you try to enable it for the first time without a connection, it will not work. Additionally, individual Google Workspace (G Suite) users may not be able to enable Gmail Offline on their own, an administrator may need to enable the feature for your organization.

How Should You Configure Gmail Offline Settings?

Quick Answer: Choose 7 days of sync if you work from the top of your inbox, 90 days if you need historical context. Select “Keep offline data” on personal devices and “Remove offline data” on shared devices. Keep “Download attachments” checked unless storage is tight.

Choosing your sync duration. Gmail Offline offers three options for how many days of messages to sync: 7, 30, or 90 days. If you typically work at the top of your inbox and rarely reference messages older than a week, 7 days is sufficient. If you frequently need historical context from older messages, choose 90 days. Longer sync durations require more local storage space.

Choosing your storage preference. You have two options: “Keep offline data on my computer” and “Remove offline data from my computer.” With the first option, your synced email data remains on your computer even after you log out of Gmail, the only way to delete it is to disable Gmail Offline entirely. With the second option, data is deleted every time you log out. “Keep offline data” is the better choice for personal devices. “Remove offline data” is the better choice for shared devices or situations where privacy is a concern.

Handling attachments. When you enable Gmail Offline, the “Download attachments” option is checked by default. This means attachments are saved locally so you can access them offline. Keep this checked if you frequently need attachment access. Uncheck it if you rarely need attachments and want to conserve local storage space. Note that in offline mode, you cannot preview attachments inline, you must download them individually. For details on Gmail file limits, see our guide to Gmail attachment size limits.

Two habits keep offline mail working. Clearing Chrome’s cookies signs you out and can wipe offline mail, so leave Gmail’s cookies alone under Content Settings > Cookies. If offline storage runs short, learn how to clean up Gmail before you shorten the sync window.

What Happens When You Send an Email in Gmail Offline?

Gmail holds the message and sends it when you reconnect. Google’s Gmail offline help page describes it this way:

If you send a message offline, it’s saved in a new “Outbox” folder. If you connect to the internet, the message is sent automatically.

So you can clear a whole inbox on a flight. Open the Outbox before you land to confirm what’s queued.

What Happens to Offline Mail When You Sign Out

Google gives you two choices under Security in Gmail’s offline settings, and a Workspace admin can take the choice away.

Google describes the keep option this way:

Keep offline data on my computer. Data stored on your device will not be deleted when signing out of your Google account or when changing your password.

Google’s admin console carries a “Force deletion of offline data on log out” setting. Google says it “prevents users from keeping content on their local devices.”

Consumer accounts get no Security section at all. Google’s removal route for them runs through Chrome’s site-data settings, which also clears saved preferences for other sites.

The Old Gmail Offline Chrome App Is Gone

Google retired the standalone Gmail Offline Chrome app and folded the capability into Gmail itself. Google states it plainly:

The Gmail Offline Chrome app is deprecated and no longer available from the Chrome Web Store. Gmail now supports offline use.

Google publishes no retirement date for it, so treat any specific date you read elsewhere as unsourced. The app also predates Chrome’s wider app phase-out, so those 2025 to 2028 milestones don’t apply here.

What Google Documents About Gmail Offline, and What It Doesn’t

Every row reflects what Google published as of 12 August 2026.

Question	Status	What Google publishes
Browser support	Documented	Google says Chrome only, and not in Incognito mode.
Sync period choices	Documented	Google says 7, 30 and 90 days, on the admin page only.
Disk space ceiling	Documented	Google says Chrome allows Gmail up to 60% of available hard drive space.
Is a bookmark required	Documented as optional	Google labels bookmarking a Tip, and offers typing the address instead.
Why Gmail shows an offline banner	Not documented	Google publishes no page using the word offline for a connection failure.
When the Chrome app was retired	Not documented	Google confirms the deprecation and publishes no date for it.

Offline access is one Gmail setting worth turning on before you need it. Our roundup of Gmail settings worth switching on covers the rest of them.

Frequently Asked Questions About Gmail Offline

Can you send email in Gmail offline?

Yes. Google says a message sent offline is saved in a new Outbox folder. Gmail sends it automatically when you reconnect to the internet.

What is Gmail Offline?

Gmail Offline is a built-in Gmail feature that syncs a specified number of days of email data to your computer through Chrome, allowing you to read, draft, and organize emails without an internet connection. Actions taken offline sync automatically when connectivity is restored.

How do you enable Gmail Offline?

Go to Gmail Settings > Offline tab, check “Enable offline mail,” configure your sync duration and storage preferences, and click Save Changes. You must have an internet connection during initial setup. Google Workspace users may need an administrator to enable the feature.

How many days of email can you sync with Gmail Offline?

Three options: 7 days, 30 days, or 90 days. Choose based on how far back you typically need to reference emails. Longer durations require more local storage. You can adjust this setting at any time in Gmail Settings.

Can you view attachments in Gmail Offline?

You cannot preview attachments inline. They must be downloaded individually. Keep the “Download attachments” option checked when enabling Gmail Offline if you frequently need attachment access. Uncheck it to save storage space if you rarely need them. See our guide on Gmail attachment size limits for more details.

Why does Gmail Offline show an insufficient storage error?

Gmail Offline stores data through Chrome’s encrypted local storage, not as regular files. Even with plenty of disk space, Chrome may be running low on allocated storage. Clear some browser cookies, reduce the number of synced days, or remove large attachments. Also check that you are not using an incognito tab or Guest profile, and verify your cookie settings to ensure mail.google.com is not set to “Clear on exit.”

How do you delete Gmail Offline data from your computer?

Disable Gmail Offline in Gmail Settings under the Offline tab. Log out, close your browser, and restart. For extra assurance, clear your Chrome browser cookies after disabling the feature. For general inbox cleanup, see our guide on how to clean up Gmail.

Why does Gmail say I am offline?

An offline banner in Gmail usually means the browser can’t reach Google’s servers, which is a connection problem rather than a Gmail setting. Check your internet, restart the device, toggle Wi-Fi off and back on, then try another network. Google publishes no help page that uses the word offline for this state.

Does Gmail offline work in Incognito mode?

No. Google states that Gmail offline only works in a Chrome window that isn’t in Incognito mode. Google also names Guest profiles and a Chrome setting that clears cookies on exit as causes of offline storage errors.

Is the Gmail Offline Chrome app still available?

No. Google says the Gmail Offline Chrome app is deprecated and no longer available from the Chrome Web Store. Gmail now supports offline use directly, and Google publishes no retirement date for the app.